US 9839257

I'll search for authoritative information on this specific patent number, including any 2026 litigation activity.

Let me run a few more targeted searches to check for any litigation or 2026 docket activity.

US 9,839,257 B2 — Summary

Sourcing note: The authoritative text below is from the patent document as fetched from Google Patents (https://patents.google.com/patent/[US9839257B2](/patent/US9839257B2)/en), corroborated by the USPTO PDF scan (patentimages.storage.googleapis.com/ca/47/8d/640b63975bca2c/US9839257.pdf) and Justia (https://patents.justia.com/patent/[9839257](/patent/9839257)). My web searches did not return any USPTO PatentCenter, PACER, or CAFC 2026 docket records for this number; I could not query those databases directly, so the litigation statement at the end is a negative finding from limited web searching, not a verified clearance.

Bibliographic data (literal)

Abstract (as issued)

A flexible, one-size-fits-all overshoe placed over a shoe covering areas damaged during skateboarding. It is made of flexible material conforming to the shoe; may be one piece or a combination of pieces. It adds cushioning and traction to the heel and ball. The mid-foot is constructed to allow stretching to fit an extremely broad range of shoe sizes. The upper and sole have added traction in the form of raised areas to improve grip of the shoe to the skateboard.

Independent claim 1 — plain-language overview

Claim 1 is the only independent claim. In ordinary terms, it covers a removable overshoe that fits over a regular shoe and must have all of the following:

1. Sole + upper structure — a sole portion, with an upper portion extending upward from it, forming a top opening into an interior that receives the shoe.
2. Frontal coverage — the upper's frontal area covers roughly the front half of the shoe, including the lace eyelet area.
3. Heel coverage — a heel portion opposite the frontal area substantially covers the shoe's heel region.
4. Sole material — the sole portion is made of a solid, stretchable rubber material.
5. Toe opening — the frontal area has a toe opening through which the shoe's toe region protrudes/is received.
6. Two displaced stretch bands — the upper has (a) a mid-upper stretch band between the frontal area and heel portion, near the top opening, and (b) a mid-sole stretch band in the same front-to-back zone but adjacent the sole portion; the two bands must be displaced from each other (different vertical positions). Both permit stretching to accommodate the shoe.
7. Front traction members — a plurality of traction members projecting outwardly from the frontal area, located both on either side of and above the toe opening.
8. Back traction members — a plurality of traction members projecting outwardly from the heel portion, adjacent the sole portion.

So the claim's novelty hook is essentially: an open-toed, heel-and-lace-covering rubber overshoe with two vertically separated stretch bands plus dedicated traction projections fore and aft.

Dependent claims (brief)

• 2 — Upper is unitary, made of solid rubber, nylon, leather, or canvas, about 0.5–5 mm thick.
• 3 — Sole thickness about 1–9 mm.
• 4 — Sole includes a stretch-banded area permitting flex.
• 5 — Upper includes a logo area with advertising indicia (alphanumeric, graphical, pictorial, photographic, or combinations).
• 6 — The toe opening exposes the shoe's toe area. (Note: claim 6 says "said toe hole" whereas claim 1 recites "toe opening" — a potential antecedent-basis defect, worth flagging in any validity analysis.)
• 7 — Both stretch bands run longitudinally frontward/rearward relative to the upper's opposed ends.
• 8 — Each stretch band is about 1–8 cm long.
• 9 — Each stretch band defines a respective opening.

Observations / uncertainties

• Spec internal inconsistency: the sole thickness is stated once as "1 mm to 9 mm" and later as "1 cm to 9 cm." The claims (claim 3) recite 1–9 mm, which controls.
• No corporate assignee. The record shows an individual (inventor) as applicant/owner and no recorded corporate assignment in the sources I retrieved. The granted patent was later the subject of an Indiegogo crowdfunding listing ("HOUKIE – #THESHOESAVIOUR" by Michael Fransko), consistent with individual ownership.
• Enforcement posture: the patent lapsed for nonpayment of the 3.5-year maintenance fee, expiring effective 2021‑12‑12. That significantly limits practical relevance of any 2026 litigation question.
• Litigation search (uncertain): I found no evidence of any Court of Appeals for the Federal Circuit 2026 docket entry, district-court complaint, or other proceeding involving US 9,839,257. Because I could not search PACER, the CAFC docket, or USPTO PatentCenter directly, I cannot state this as an authoritative negative — only that no such activity surfaced in searches. If you need a definitive answer, that requires a direct PACER/CAFC docket query by patent number or by party ("Fransko").

I'll search for litigation involving US patent 9839257 across patent litigation sources.

Initial searches returned mostly unrelated results. Let me target litigation-specific databases.

Litigation Report — U.S. Patent No. 9,839,257

Bottom line: I found no evidence of any litigation involving U.S. Patent No. 9,839,257 in the sources searched. As of today's date (April 26, 2026), no known case names, docket numbers, or parties are associated with this patent.

I want to be explicit that this is a negative finding, not a confirmation that none exists. Here is exactly what I searched and what I found.

The patent at issue (as identified)

The claimed subject matter is an overshoe with a stretchable upper and sole, a toe opening, front and rear traction members, and stretch bands in the mid-upper and mid-sole regions (claims 1–9).

Searches performed

I ran searches aimed at the litigation-specific sources you named, plus general patent-litigation aggregators and docket text:

1. US9839257 litigation
2. 9839257 patent lawsuit
3. "9,839,257" patent infringement complaint
4. unifiedpatents.com litigation 9839257
5. Fransko skateboard shoe protector overshoe lawsuit
6. "Michael Edward Fransko" patent litigation

Results: Every hit was either (a) the patent's own prosecution/publication record (Google Patents, Justia Patents, FreePatentsOnline, PatentHub, the USPTO PDF), (b) the inventor's Indiegogo crowdfunding campaign for the "Houkie Skateboard Shoe Protector," or (c) unrelated litigation involving different patent numbers (e.g., patents ending in '629, '982/'985, '839, '111) and unrelated parties (Netlist, Realtime Data, MCOM IP, Unified Patents IPRs on other patents). None of them reference 9,839,257 as a patent-in-suit.

Important limitation: I was not able to directly query the Unified Patents litigation portal caselist, PACER, or the CourtListener/Justia docket databases with a working filtered request for this specific number — my tool returned only general web results. A search of the Unified Patents portal (https://portal.unifiedpatents.com/litigation/caselist) filtered on 9839257, a PACER/RECAP search in CourtListener, and a Docket Navigator or Lex Machina query would be the authoritative confirmation. I cannot verify those directly here, so treat the negative finding as provisional.

Context that bears on the likelihood of litigation

Several facts in the record make litigation on this patent unlikely, and are worth noting for your risk assessment:

• Assignee is an individual, not a practicing company or NPE portfolio. The patent was never assigned away from the inventor.
• The patent lapsed. Maintenance fees were not paid; it expired effective 2021-12-12, with the lapse recorded 2022-01-17. Damages for any infringement would be cut off at lapse, and the patent owner would have had a short enforcement window (Dec. 2017 – Dec. 2021).
• Term adjustment only — no PTA/PTE issues that typically accompany high-value pharma litigation.
• No continuation family. Google Patents shows only one application in the family (14/873,874) and no continuation/divisional siblings that would generate follow-on suits.

Answer to your question

No known litigation involving U.S. Patent No. 9,839,257. No plaintiff, defendant, jurisdiction, case number, filing date, or outcome can be reported because no case was located.

If you need a defensible confirmation, I recommend running the following three targeted checks (which I could not complete within my tool limits):

1. Unified Patents portal – https://portal.unifiedpatents.com/litigation/caselist search 9839257 (also check the PTAB caselist for any IPR/PGR on this patent).
2. CourtListener / RECAP – full-text and docket search for "9,839,257" and "Fransko."
3. Docket Navigator or Lex Machina – filter by patent number 9839257 for district court, ITC § 337, and PTAB proceedings.

Additionally, because the patent expired in 2021, any litigation would predate that lapse, so historical docket databases (not just current-case feeds) are the right tool.

I'll verify the structured "no proceedings" finding against public sources before committing to a negative.

Let me probe the near-miss number and look for any litigation or PTAB activity under the inventor/owner name.

One more check for any 2026 assertion activity or defensive-aggregator involvement under the owner's name.

PTAB proceedings on file — US 9,839,257 B2 ("Flexible skateboard shoe protector overshoe")

Canonical source acknowledged: the structured "PTAB proceedings on file" block supplied in this prompt — drawn from the USPTO Open Data Portal — returns no AIA trial proceedings for this patent. I treat that as authoritative for the proceedings list and did not invent any numbers to fill the gap. The web searches below were run only to see whether any recently-filed or un-indexed proceeding surfaced; none did.

Proceedings overview

Total AIA trial proceedings on US 9,839,257: 0 — no IPRs, no PGRs, no CBMs, and therefore no claims invalidated, none sustained, none settled, and no institution decisions (denied or otherwise).

Bottom-line defensive posture for a defendant: there is no PTAB invalidation history to lean on, but there is also no PTAB hardening — the claims have never been tested adversarially, so they carry zero agency-level presumption of validity beyond the ordinary § 282 presumption. The far more consequential fact for a defendant today is commercial/legal, not procedural: the patent lapsed for nonpayment of maintenance fees, effective 2021-12-12, and the patent owner is an individual (Michael Edward Fransko, Sr.) with no corporate assignee of record. A live assertion of this patent in 2026 would be unusual on both counts. Do not, however, treat the absence of IPRs as evidence of strength — the correct reading is the opposite: negligible assertion activity means no one has had commercial reason to file.

Proceedings

None. There are no proceedings to list — no proceeding numbers exist for this patent, and I will not fabricate any.

For completeness, here is what I checked and what I found:

⚠️ Number-collision hazard — flag before you cite anything

My searches surfaced substantial PTAB activity against U.S. Patent No. 9,836,257 — a different patent (Flexiworld Technologies, wireless output/printing), e.g. IPR2022-01267, Roku, Inc. v. Flexiworld Technologies, Inc. That number is 9,836,257, not 9,839,257. The digits "83" and "39" sit in the same position and the two are easy to conflate in a demand letter, an invalidity chart, or a docket pull. There is a real risk that a third-party database, or an automated litigation-monitoring feed, reports Flexiworld IPRs against "9,83x,257" and someone on your team assumes it is the skateboard overshoe. Verify the full seven digits on the face of any record before relying on it. I found no IPR, PGR, or CBM anywhere involving 9,839,257.

Also note a second, unrelated "9,839,257"-shaped artifact in my search results: WO1998039257A1 ("Method and equipment for the evaluation of scale dissolvers") — the string appears inside the WO number. Not related.

Strategic summary

Claim status of 9,839,257. No claim of this patent has ever been canceled, narrowed, or confirmed in an AIA trial, because no AIA trial was ever instituted. Claim 1 remains the sole independent claim, with dependent claims 2–9 intact as issued on 2017-12-12. On paper, claims 1–9 are all "untested, as issued." The real-world qualifier is that the patent is expired — Fee Related, maintenance-fee lapse effective 2021-12-12 (37 CFR 1.362), with an adjusted expiration listed as 2035-12-22. For infringement purposes the patent cannot be infringed by conduct occurring after expiry, and damages windows for a 2026 assertion would be limited to pre-expiry conduct — which, combined with the apparent absence of any commercial product in market and the owner's individual status, is a strong practical bar before validity is even reached. This cross-references the Patent summary section above; I am not re-deriving it, and it is consistent with what was stated there.

Estoppel landscape. § 315(e)(2) estoppel is a null set here — it attaches only to a petitioner who reaches a final written decision, and there is no petitioner and no FWD. That cuts in one direction only: no prior-art ground has been burned by anyone. Any defendant is free to run § 102/§ 103 art, and any party that never filed is not estopped, but neither is any party that never filed estopped from filing. Practically, the absence of estoppel matters little given the patent's expiry; the useful observation is that the prosecution-history file wrapper and the patent's own 45-item cited-art list (a dense overshoe/shoe-protector field: US 228,769; 1,465,504; 2,032,793; 2,068,238; 2,281,321; 3,250,025; 3,724,107; 4,434,565; 5,315,767 (Bradbury, "Shoe sole saver"); 5,396,717; and the applicant's own cited US 2010/0325922 ("Shoe protector for skateboarding applications") — see the Citations (45) table in the patent record) is the natural starting corpus for any § 102/§ 103 attack on the two-stretch-band and fore/aft traction limitations of claim 1.

Pattern signals. None of the classic patterns are present:

• No repeat petitioner. No petitioner at all.
• No aggressive PTAB appellate posture by the owner. No FWD to appeal, so no CAFC appeal from a PTAB decision exists. (I found no CAFC docket entry under either the patent number or "Fransko"; note the same caveat as below — I could not query the CAFC docket directly.)
• No defensive aggregator. No evidence that Unified Patents or any similar entity has filed against this patent, which is consistent with the patent's low assertion profile and individual ownership.
• Off-record context worth knowing (non-PTAB, not dispositive): press reporting from the Vineland Daily Journal / Courier-Post (2020-06-05, https://www.courierpostonline.com/story/news/2020/06/05/vineland-police-officer-charged-tax-fraud/3159189001/) states the inventor was charged in Cumberland County, NJ with tax-fraud offenses connected to his Houkie Worldwide LLC skateboard-protector business, and an Indiegogo campaign ("HOUKIE – #THESHOESAVIOUR") exists for the product. This is background on enforceability/ownership optics, not a PTAB fact, and I am not drawing a legal conclusion from it.

Recommended next steps

1. State it plainly: there is no PTAB activity on US 9,839,257. Nothing was instituted, nothing was denied, nothing settled, and no claim was canceled or confirmed. Any memo or demand response that references an "IPR on the '257" is almost certainly misfiring onto 9,836,257 (Flexiworld) — re-verify the digits.
2. Lead with the status defect, not validity. Before building an invalidity case, confirm the fee-lapse: the Legal Events table shows LAPS / STCH / FP with effective date 2021-12-12 and "PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362." Check the PatentCenter fee record to confirm it was not reinstated under 37 CFR 1.378 (petition to accept late payment) — I found no evidence of reinstatement, but I could not query PatentCenter directly, so treat this as a verification step. If lapsed and not reinstated, an assertion of this patent is vulnerable on standing/enforceability grounds independent of any IPR.
3. If you ever do need the invalidity ground: build it from the patent's own 45-reference citation list plus the cited skateboard-specific art (US 2010/0325922 Esposito; USD639031S; US 2014/0020267 Perez), focused on claim 1's two vertically-displaced stretch bands ("said stretch band... is displaced from said another stretch band") and the "both sides of and above said toe opening" traction limitation — the two features the applicant appears to have relied on for allowance.
4. Flag the § 112 housekeeping issue already noted in the summary section: claim 6 recites "said toe hole" while claim 1 recites "toe opening" — an antecedent-basis defect that is worth preserving in any claim-construction or invalidity analysis, though it is not a PTAB-fact.
5. Direct docket verification (I could not do this from here): for a definitive negative, run the patent number and "Fransko" through PACER/Justia Dockets, the CAFC docket, and PTAB E2E / PTAB Center (https://ptacts.uspto.gov), plus CourtListener (https://www.courtlistener.com). My searches surfaced no docket records, but search engines are an unreliable instrument for a negative on court dockets.

Caveats I am holding to: I made no claim about any FWD because none exists; I quoted no claim numbers from decisions because there are no decisions; and every date above is taken from the patent record (YYYY-MM-DD). Sources: https://patents.google.com/patent/[US9839257B2](/patent/US9839257B2)/en; https://patentimages.storage.googleapis.com/ca/47/8d/640b63975bca2c/US9839257.pdf; https://patents.justia.com/patent/9839257.

I'll research the assignment record and ownership history for this patent.

I have enough to complete the reconstruction. Two searches at the end returned no results/limit, but the key evidence is in hand.

Assignment & Ownership Reconstruction — US 9,839,257 B2

A note on method before the findings: The USPTO Assignment Center (https://assignmentcenter.uspto.gov/) and its index at https://assignment.uspto.gov/patent/index.html are not directly queryable with the tools I have. My evidence for "no recorded assignments" is therefore indirect but convergent: (a) the full Google Patents record (which ingests USPTO assignment data and would display any reel/frame entries as legal events) contains zero assignment-type events — only STCF (grant), FEPP (fee reminder), LAPS, STCH, and FP (lapse); and (b) the issued patent's own front page shows (71) Applicant: Michael Edward Fransko, Sr., Millville, NJ (US) with no assignee block ((73)) at all. That combination is the signature of an unassigned patent held personally by its sole inventor. I could not execute a live Assignment Center query, so treat the null finding as high-confidence-but-not-verified-in-database.

Contradiction check against the prior summary: No contradiction. The earlier summary's "Assignee: None — Individual" is confirmed here and is reinforced by a new fact: a product company exists (Houkie Worldwide LLC) that the press describes as holding the patent, yet that company was never recorded as assignee. Flagging that gap below.

Inventors

• Single-inventor patent. There are no joint inventors, so the classic "all inventors departed the assignee within 12 months" red flag is not applicable — there was never a corporate assignee for them to depart from.
• Unusual pattern (present, benign): this is a hobbyist/pro-se-profile inventor who commercialized through his own closely-held LLC rather than a manufacturer. That is the opposite of a portfolio fire-sale precursor; it correlates with micro-entity status, which the maintenance-fee record confirms ("ENTITY STATUS OF PATENT OWNER: MICROENTITY").
• Source: US 9,839,257 B2 front page (https://patentimages.storage.googleapis.com/ca/47/8d/640b63975bca2c/US9839257.pdf); Courier-Post / Vineland Daily Journal, "Vineland police officer charged with tax fraud in connection with skateboard-related business," 2020-06-05 (https://www.courierpostonline.com/story/news/2020/06/05/vineland-police-officer-charged-tax-fraud/3159189001/); Telegram.com / Daily Journal, "Skateboard park donation tied to Houkies promotion," 2018-04-24 (https://www.telegram.com/story/news/2018/04/24/skateboard-park-donation-tied-product-promotion/548191002/).

Original assignee

• Entity named on the issued patent: none. The (71) applicant block names Michael Edward Fransko, Sr., Millville, NJ personally. Google Patents renders both "Original Assignee" and "Current Assignee" as "Individual." There is no (73) assignee and no corporate owner of record.
• Did they ship a product embodying the claims? Yes — but through a company that is not the patent owner of record. The Houkie Skateboard Shoe Protector (marketed as "Houkies") was manufactured (molds cut with a China-based firm; production in Middlesex County, NJ) and sold at roughly $19–$25 per pair, per contemporaneous reporting. Houkie Worldwide LLC (Millville, NJ) is described as the operating company; Fransko is its president/CEO. A related Indiegogo campaign ("HOUKIE – #THESHOESAVIOUR") was identified in the prior summary.
• Primary line of business of the owner: none — the owner is a natural person. The commercializing entity's business was consumer skateboarding accessories (protective overshoes) with a skate-park sponsorship/donation program.
• Current status:
  • Patent: expired. Maintenance-fee lapse effective 2021-12-12; USPTO events LAPS/STCH recorded 2022-01-17 and FP 2022-02-08 ("PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES," 37 CFR 1.362). Adjusted expiration otherwise would have been 2035-12-22.
  • Owner: unclear. In June 2020 the inventor was charged in Cumberland County (NJ) Superior Court with failure to pay state income tax, filing a fraudulent return, and theft by failure to make required disposition (all third-degree) arising from funds taken from the Houkie Worldwide LLC bank account. I found no Chapter 7/11 bankruptcy filing for Fransko or Houkie Worldwide LLC, and I could not verify the LLC's current corporate status (active/dissolved). Marked unclear, not "dissolved."
  • Discrepancy worth recording: the 2020 press account states Fransko "through his company Houkie Worldwide LLC … secured a U.S. patent." The legal record does not bear that out — the patent issued to the individual with no assignment to the LLC ever recorded. Either the transfer to the LLC was never documented/recorded, or the press simplified the ownership. This is the single most important ownership-chain gap in the file.

Assignment timeline

There are no recorded assignments for US 9,839,257. Google Patents' legal-events table for this patent contains no AS/assignment entries, no reel/frame numbers, no conveyance types, no assignors, assignees, or assignment correspondents. The only recorded events are the grant and the maintenance-fee lapse:

Finding: the chain is a single-node chain — inventor → inventor. Because the Assignment Center shows no records, there is no reel/frame to analyze, no conveyance type, and no assignment correspondent to test for repeat-player patterns. The only attorney of record anywhere on this patent is Dale J. Ream, listed as the (74) prosecution attorney/agent — a single appearance with no recurrence in an assignment capacity, so it does not satisfy the repeat-correspondent signal.

Per the task's stop rule, I note plainly: the Assignment Center has no records for this patent. I continue below only to complete the requested analysis framework on the null record, not to imply transfers that the record does not contain.

Timeline diagram

The diagram shows the actual ownership/status events (no assignments occurred):

timeline
    title Ownership and status of US 9839257
    2015 : Provisional filed by Fransko Sr
         : Utility application filed by Fransko Sr
    2017 : Patent issued to Fransko Sr
    2018 : Houkie Skateboard Shoe Protector ships
    2020 : Inventor charged with tax fraud
    2021 : Maintenance fee unpaid
    2022 : Patent expires for nonpayment

NPE / troll-pattern signals

1. Shell-entity transfer — NOT PRESENT. There are zero assignment records (no reel/frame). The patent issued to a natural person and remained there. A corporate name (Houkie Worldwide LLC) appears in press coverage but was never recorded as assignee, so there is no operating→licensing-LLC transfer to assess. Naming alone is not a finding.
2. Known asserter in the chain — NOT PRESENT. No assignee of record exists to compare, and neither "Michael Edward Fransko, Sr." nor "Houkie Worldwide LLC" appears on any Acacia / Marathon / IV / IPNav / Wi-LAN / Conversant / Vringo / Pendrell / Round Rock / Spangenberg list I could surface. No Unified Patents or RPX high-frequency-plaintiff match.
3. Repeat correspondent across the chain — NOT PRESENT. No assignment recordings exist, hence no assignment correspondent at all. The sole attorney on the patent, Dale J. Ream ((74), prosecution), appears once; a single appearance is expressly not a finding.
4. Cascading transfers — NOT PRESENT. Zero transfers over any period, let alone multiple LLC hops in <24 months.
5. Pre-litigation transfer — NOT PRESENT. No transfer exists, and no infringement suit naming US 9,839,257 was found in web searching (no district-court complaint, no CAFC 2026 docket entry). Litigation search is a negative finding from limited sources, not a PACER-verified clearance.
6. Bankruptcy fire-sale — NOT PRESENT. No Chapter 7/11 proceeding found for Fransko or Houkie Worldwide LLC. The 2020 criminal tax-fraud charge is a personal/state criminal matter, not a bankruptcy or patent-sale event, and must not be conflated with a fire-sale.
7. Privateering — NOT PRESENT. No operating-company→NPE transfer and no SEC filing (the inventor and LLC are private, non-reporting entities).
8. Defensive aggregator — NOT PRESENT. The chain does not terminate at RPX, AST, LOT, Unified, or OIN; it terminates at an individual owner, then at statutory expiry.

Unresolved / unclear items: (a) whether an unrecorded assignment to Houkie Worldwide LLC exists (the press claims the company held the patent; the record does not); (b) current corporate status of Houkie Worldwide LLC; (c) whether any successor-in-interest to the late-life patent exists given the expired, fee-lapsed status.

Verdict

Insufficient data — the Assignment Center contains no records for this patent, so by the rubric's own definition ("no records, or only the original assignment") that is the controlling category. Substantively, however, the evidence affirmatively points away from an NPE: the patent issued to a sole individual inventor (face-of-patent (71) applicant Michael Edward Fransko, Sr.; no (73) assignee), was commercialized as a real retail product (Houkie Skateboard Shoe Protector, ~$19–$25/pair) through his own operating LLC, was never the subject of any recorded transfer, and expired on 2021-12-12 for nonpayment of the 3.5-year maintenance fee (USPTO events LAPS/STCH 2022-01-17), with no litigation found.

Verification links: https://assignmentcenter.uspto.gov/ and https://assignment.uspto.gov/patent/index.html — search by patent number 9839257 or by party "Fransko." A direct query should return the same null result reported here; if it returns a reel/frame, that record supersedes this analysis.

Residual uncertainty: I could not query the Assignment Center, PACER, or the CAFC docket directly, and one litigation search returned no usable results due to a step limit. The negative finding on litigation and on recorded assignments is high-confidence but not database-verified.

I'll verify the cited prior art references against authoritative sources before analyzing them claim-by-claim.

Prior-Art Analysis — U.S. Patent No. 9,839,257 B2

0. Scope, sourcing, and confidence

Patent identified (literal, verified): US 9,839,257 B2 — "Flexible skateboard shoe protector overshoe," inventor Michael Edward Fransko, Sr.; App. 14/873,874; priority 2015‑09‑16 (prov. 62/219,221); filed 2015‑10‑02; granted 2017‑12‑12; assignee "Individual." Confirmed via the fetched Google Patents record (https://patents.google.com/patent/[US9839257B2](/patent/US9839257B2)/en).

What "each patent citation for 9839257" means here: the granted patent's face lists 45 cited references (the "Patent Citations (45)" table). Those are the backward citations analyzed below. The four "Cited By" documents (USD836893, USD855300, US10398190, US11266201) post‑date the 2015 priority date and are therefore not prior art — I mention them only to exclude them.

Confidence caveats (stated explicitly rather than papered over):

• I pulled the full text of some references in this session (US 3,724,107; US 5,396,717; US 7,383,646; US 2007/0113424; US 2010/0325922; US 2014/0020267; US 2009/0083993). For the remainder, the description is derived from the citation table plus title/classification/known disclosure; those §§102/103 assessments are provisional and flagged as such.
• Every date below is taken as listed on the face of US 9,839,257 (filing/priority and publication dates as recorded), not auto-corrected.

1. Legal framework applied

• Post‑AIA statute. The application carries a 2015 priority date, so 35 U.S.C. §102(a)(1) and (a)(2) govern. Every one of the 45 references issued/published before 2015‑09‑16, so each qualifies as prior art under §102(a)(1) (patented or described in a printed publication).
• Anticipation is element‑by‑element. Under §102 a reference anticipates a claim only if it discloses every limitation, arranged as in the claim (Net MoneyIN v. VeriSign). For a claim as narrow as claim 1, single‑reference anticipation is difficult. Where a reference discloses most but not all elements, it is properly §103 obviousness art, not §102 art — I distinguish the two throughout, because conflating them is the most common error in this kind of exercise.
• Claim 1 elements used as the mapping key:

Dependent claims: 2 (unitary; rubber/nylon/leather/canvas; 0.5–5 mm), 3 (sole 1–9 mm), 4 (sole stretch‑banded area), 5 (logo area), 6 (toe hole exposes toe — note the "toe hole" vs. "toe opening" antecedent issue flagged in the earlier summary), 7 (bands run longitudinally), 8 (bands 1–8 cm), 9 (bands define openings).

2. Master table — all 45 cited references

"§102 exposure" = claims that could arguably be anticipated if the reference discloses every element; "§103 only" = missing at least one E‑element and therefore good only for obviousness.

3. The three closest §102 candidates (element‑by‑element)

3.1 US 3,724,107 A — Elastic overshoes (Makinen & Srail; B.F. Goodrich), filed 1971‑11‑08, pub. 1973‑04‑03

Verified full text. Disclosures that map to claim 1:

• E1 ✔ — "FIG. 1 has a sole portion 10 and an upper portion 11," with a reinforcing bead 12 at the edge; a hollow overshoe pulled over a street shoe.
• E4 ✔ — molded, vulcanized all‑rubber overshoe (explicitly "a simple molded all‑rubber article containing no fabric").
• E3 ✔ (substantial) — the sole is formed under the heel 15; upper encases the rearfoot.
• E10 ✔ (partial) — "The sole under the toe and ball of the foot 14, and also under the heel 15, is formed with a pattern" (anti‑slip pattern) — a traction structure at the heel, though on the sole, whereas claim 1 recites back traction members extending from the heel portion of the upper adjacent the sole.
• One‑size / broad‑range fit ✔ — molded in a single symmetric size ("symmetrical rather than right or left shoe shape") and stretched over a "wide range of sizes and styles of shoes"; the instep 13 is made thinner and arched so that "longitudinal stretching will occur to a greater extent at the instep" — substantive support for claim 1's stretch‑to‑fit concept and claim 4's "stretch‑banded area."

Where it fails claim 1: no toe opening (E5 — it is a closed overshoe); no mid‑upper stretch band region as a discrete band (E6); no separate mid‑sole stretch band displaced from the upper band (E7/E8); no front traction members on both sides of and above a toe opening (E9). It also does not describe lace‑eyelet coverage (E2) as an express feature.

Conclusion: Anticipates nothing in claim 1 as a whole. It is the single best §103 reference — combined with a toe‑opening/elastic‑band cover (e.g., Hall) and a skate‑specific traction pad (e.g., Perez/Esposito), it renders claim 1 obvious. It could anticipate dependent claims 2 and 3/4 if its disclosure is read as a unitary rubber upper of the recited thickness and a sole flex region — but the thickness ranges (0.5–5 mm; 1–9 mm) are not disclosed, so even those are §103, not §102.

3.2 US 7,383,646 B2 — Athletic shoe cover (Hall), filed 2000‑12‑05, pub. 2008‑06‑10

Verified full text. Disclosures:

• E1 ✔ — cover with upper member 32 and an elastic lower member 34 extending under the sole.
• E2 ✔ — covers the mid‑foot region and, via zipper seam 36, the shoelace closure 30.
• E5 ✔ — "annular toe opening 44 through which the toe of shoe 22 projects," with an elastic band 50 sewn in at the toe opening.
• E3 ✔ — the upper "extends above and encircles the wearer's ankle."
• Claim 5 ✔ — "displays a team logo 40 … patch or stencil‑painted symbol."

Where it fails claim 1: the material is elastic fabric, not a "solid, stretchable rubber" sole portion (fails E4). The elastic elements are bands at the two openings (toe opening 44 and ankle opening 38 with C‑shaped band 52), i.e., not a mid‑upper band near the top opening displaced from a mid‑sole band (fails E6/E7/E8 on any faithful reading). And there are no outwardly extending front/back traction members on the upper (fails E9/E10).

Conclusion: No §102 anticipation of claim 1. It is highly material §103 art for E2 and E5, and a genuine §102 candidate against dependent claim 5 (logo area with indicia) standing alone — but claim 5 incorporates claim 1, so anticipation of claim 5 requires all of claim 1 too. Net: §103.

3.3 US 5,396,717 A — Convertible overshoe with tear‑resistant bead (Michael Bell), filed 1993‑06‑21, pub. 1995‑03‑14

Verified full text. Disclosures:

• E1 ✔ — "basically comprises an upper 24 and a sole 26," hollow member, top opening 32 in sidewall 28 for inserting the shoe.
• E4 ✔ — "molded as an integral unit of any suitable material, e.g., polyvinyl chloride [or rubber]"; sidewall is "elastic… to enable it to stretch."
• E3 ✔ — sidewall extends about the entire periphery; rearfoot encased.
• E10 ✔ (partial) — "The sole includes anti‑slip grit on its outer surface."
• Broad size accommodation ✔ — the whole invention is a one‑size overshoe convertible to a larger shoe by trimming to a trim line; reinforcing bead prevents tearing when stretched.

Where it fails claim 1: no toe opening (E5); the elastic material is a continuous sidewall, not a discrete mid‑upper band (E6) or displaced mid‑sole band (E7/E8); no front traction members above/beside a toe opening (E9).

Conclusion: No §102 anticipation; strong §103 combination partner (elastic rubber overshoe + stretch‑to‑fit + sole traction + conversion for size range).

Honorable mentions that reach only §103: US 2007/0113424 A1 (Bell — unitary molded rubber overshoe with slip‑resistant sole, E1/E3/E4/E10) and US 2,068,238 (Malm — flexible rubber overshoe).

4. Field‑specific references that do not anticipate (important negative findings)

These are the most topically relevant references (skateboarding), so they deserve explicit treatment even though they fail §102:

• US 2010/0325922 A1 (Esposito) — same problem statement (grip‑tape "ollie area," broken laces), but the protector is a flat, thin, adhesive‑backed pad for the shoe side/ollie area, "generally flat and relatively thin," sized universally, applied by adhesive. It has no sole portion, no interior cavity, no heel‑covering portion, no toe opening, and no stretch bands. No claim of US 9,839,257 is anticipated.
• US 2014/0020267 A1 (Perez) — replaceable gum‑rubber grip pad (35–65 durometer) affixed to skate‑shoe "skate‑able contact surface areas" with adhesive (or hook‑and‑loop), optionally covering toe‑wrap, sidewall, curtain, and lace/eyelet areas. It is a pad, not an overshoe; it lacks the sole portion, interior, heel portion, toe opening, and displaced stretch bands. No anticipation (it does supply §103 motivation for the "traction/friction‑enhanced pattern on the upper" and "lace/eyelet protection" concepts).
• US D639,031 S1 (Smith) — a design patent for a skateboard shoe protection device. A design patent's disclosure can theoretically anticipate a utility claim, but only if its drawings plainly disclose every claimed structural element and its function; nothing here discloses the two displaced stretch bands, rubber sole thickness ranges, or traction members as claimed. No anticipation.
• US 2009/0083993 A1 (Plank) — the specification says the cover "leaves a heel substantially exposed and uncovered." That is the opposite of claim 1's E3 ("heel portion … substantially cover[ing] a heel region"). No anticipation; and it teaches away from the full‑coverage overshoe. (Note: the earlier "Patent summary" lists this document as related art — correct — but it is not, and cannot be, an anticipatory reference for claim 1.)
• US 5,165,182 A (Kimberly‑Clark, Open‑ended shoe cover) — an open‑ended cover; fails E3.

5. The design patents (7 references) — why none anticipate

US D319,140 S, US D353,707 S, US D413,711 S, US D619,338 S1, US D619,339 S1, US D639,031 S1, US D727,000 S1. A US design patent claims ornamental appearance, not utility. Its §102 value against a utility claim exists only where the drawing unmistakably discloses the claimed structure and it is "clearly and unequivocally" present. Here, none discloses the combination of (a) a solid stretchable‑rubber sole, (b) a toe opening, (c) two vertically displaced stretch bands (E6–E8), and (d) front traction members on both sides of and above the toe opening plus back traction members on the heel (E9/E10). No design reference anticipates any claim of US 9,839,257. Their practical role is as §103 evidence of the crowded overshoe‑design field.

6. Bottom line

1. No cited reference anticipates independent claim 1 under §102. The claim's novelty resides in a specific combination: (i) a solid stretchable‑rubber sole, (ii) a toe opening, (iii) two vertically displaced stretch bands — one mid‑upper, one mid‑sole, and (iv) front traction members positioned both beside and above the toe opening plus back traction members adjacent the sole. No single one of the 45 references discloses all ten elements (E1–E10). The closest — US 3,724,107 (Goodrich/Makinen), US 7,383,646 (Hall), US 5,396,717 (Bell), and US 2007/0113424 (Bell) — each supply at most four or five of the ten.

2. The strongest §102 exposure is at the dependent‑claim level, and only conditionally: US 3,724,107 comes closest to claims 2–4 (one‑piece stretchable rubber, sole flexibility/stretch region, sole traction pattern), but does not disclose the recited thickness ranges (0.5–5 mm upper; 1–9 mm sole) or a "stretch banded area" as such — so even these are better characterized as §103.

3. All 45 references remain powerful §103 art when combined: rubber overshoes with sole traction (3,724,107; 5,396,717; 2007/0113424) + an elastic toe‑opened lace‑covering cover (7,383,646) + skate‑specific upper/lace traction pads (2010/0325922; 2014/0020267) + symmetric/size‑adjustable overshoe construction (3,724,107). That combination would place serious pressure on claim 1's patentability — consistent with the patent's Expired – Fee Related status and the absence of any continuation family.

4. Cross‑reference to the earlier sections (no contradiction found): the business/legal posture (individual assignee, lapse effective 2021‑12‑12, no located litigation) is unaffected by this prior‑art review. One small reconciliation worth flagging: the patent's own "Related Applications" paragraph lists several of these citations with mis‑stated "issued" dates (e.g., it calls US 2009/0083993 "issued Oct. 1, 2007" when that is its filing date, and US 2010/0325922 "issued Jun. 28, 2010" when that is its filing date). I have used the Google Patents citation‑table dates (filing/priority and publication), which are internally consistent and correct for §102 prior‑art‑date purposes.

If you need definitive per‑element pin cites (column/line or paragraph numbers) for any specific reference in the table above to support an invalidity contention, tell me which ones and I will pull the full PDFs — my §§102/103 verdicts for the not‑fully‑retrieved references in the table are, as flagged, provisional.

I'll ground the analysis in the actual cited prior-art references rather than relying on memory. Let me pull details on the most relevant ones.

Let me pull the remaining stretch/overshoe references that bear on the "stretch band" and traction limitations.

Obviousness Analysis — U.S. Patent No. 9,839,257 B2

Under 35 U.S.C. § 103(a) (AIA), as of the 2015‑09‑16 priority date

Builds on, and does not repeat, the prior "Patent summary" and "Litigation summary" sections. Those already established the bibliographic record, the claim set, and the negative litigation finding. This section addresses validity only.

Cross-reference check — one item to reconcile: the earlier summary states the maintenance-fee lapse is "effective 2021‑12‑12" (consistent with the Google Patents Legal Events table: FP Lapsed due to failure to pay maintenance fee — Effective date: 20211212). The litigation summary says "lapsed... effective 2021‑12‑12, with the lapse recorded 2022‑01‑17." That is internally consistent; no contradiction to flag. One spec-internal inconsistency was already flagged (sole thickness "1 mm to 9 mm" vs. "1 cm to 9 cm") and is not repeated here.

1. Legal framework applied

Because application 14/873,874 was filed 2015‑10‑02 (post‑March 16, 2013), the AIA version of § 103 governs. All 45 references listed under "Citations" on the face of the patent bear publication dates from 1880 through 2015‑04‑21 — i.e., all of them predate the 2015‑09‑16 priority date and therefore qualify as prior art under § 102(a)(1)/(a)(2) to the extent their disclosures reach the claimed elements.

The controlling inquiry is the Graham four-factor test (Graham v. John Deere Co., 383 U.S. 1, 17–18 (1966)), applied as refined by KSR Int'l Co. v. Teleflex Inc., 550 U.S. 398 (2007):

• A combination of known elements is obvious where the elements are known in the field, the combination is a predictable use of prior art elements according to their established functions, and there is an articulable reason to combine (design incentive, market demand, the nature of the problem, or the references' own teachings). KSR, 550 U.S. at 416–17, 421.
• A predictable "arrangement of old elements" with no new functional relationship is not patentable. Id. at 416; In re ICON Health & Fitness, Inc., 496 F.3d 1374, 1379 (Fed. Cir. 2007).
• The motivation may come from the references themselves, from the state of the art, or from the ordinary creativity of the PHOSITA. MPEP § 2143.

Field / PHOSITA. The patent classifies to A43B 5/18 (attachable overshoes for sporting purposes), A43B 3/16 (overshoes), A43B 13/22 (slip-preventing soles), and A43B 3/26 (footwear adjustable as to length or size). The PHOSITA is a designer of athletic/overshoe footwear and, more specifically, of skate‑shoe protective accessories. Critically, every reference cited on the face of this patent is directed to footwear covers, overshoes, or shoe protectors — this is a single, densely crowded art. That density cuts against any nonobviousness argument based on non-analogous art; there is no art here the PHOSITA would not consult.

2. Claim 1 element map

Claim 1 is the sole independent claim; the patent rises or falls on it. Below, each limitation is mapped to the references actually retrieved and verified (marked ✓) versus those whose subject matter I am relying on only from title/classification (marked ~). I flag this distinction deliberately rather than overstating the record — see § 7.

Every element of claim 1 is disclosed in the cited art. None of the three asserted points of novelty — (a) toe opening, (b) two displaced stretch bands, (c) fore/aft traction projections on the upper — is individually novel. The § 103 question is therefore purely whether the combination was nonobvious.

3. Primary combination — renders claim 1 obvious

Combination A: US 3,724,107 (Makinen/Srail, B.F. Goodrich) + US 2,281,321 (Olson/L'Hollier, B.F. Goodrich) + US 2010/0325922 (Esposito) + US 2005/0229428 (Holcomb)

What each reference contributes

• US 3,724,107 supplies the claimed chassis: a one‑piece molded, vulcanized, all‑rubber overshoe having a sole portion 10 and upper portion 11, a top opening receiving a street shoe, a sole pattern of protuberances under the ball 14 and heel 15, and — decisively — a sole made thinner and arched at the instep 13 so that longitudinal stretching concentrates at mid‑foot. It is also symmetrical ("neither a right nor left shape") and expressly molded in a single size "to permit use on a wide range of sizes and styles of shoes." Note: the '257 specification's own symmetry and "one size fits all" advantages are verbatim attributes of this 1971 reference.
• US 2,281,321 supplies the second, vertically displaced stretch band: an elastic rubber upper whose heel section is rendered locally stretchable by spacing the lining margins, expressly for "easy donning and doffing together with a close clinging fit." Structurally, this is a second localized elastic zone in the upper, sitting above the '107 sole-level elastic zone. Together the two references disclose two elastic zones at two different heights — the precise "displaced stretch band" relationship claim 1 recites.
• US 2010/0325922 supplies the skateboarding-specific frontal coverage: a thin, flexible, conformal protector whose flap covers the shoelace holes and the laces themselves, sized to the ollie area defined by "the first shoelace hole," "the first two," or "the first three." This is the claimed "frontal area covering approximately a front half… and the laces eyelet area."
• US 2005/0229428 supplies the traction-on-the-upper feature: a traction sole molded to a stretchable elastic upper (claim 1: "said upper being made of flexible elastic material"; claims 2–4: latex/elastic nylon/spandex) with traction extending partially upward along the wall of the upper at the toe and heel, plus a toe/heel sole configuration. That is, literally, "traction members extending outwardly from" the upper's frontal and heel regions adjacent the sole.

Articulated motivation to combine (the KSR "reason" element)

1. Same field, same problem, same elements. All four are oversight/protective footwear for a shoe worn inside a cover; all are cited on the face of the patent. In re Keller, 642 F.2d 413, 425 (CCPA 1981) (a reference is combined with another for what it fairly teaches).
2. The references themselves supply the incentive. US 3,724,107 states the goal of fitting "a wide range of sizes and styles of shoes" from one mold; US 1,841,710 (same family of art) states the goal of covering "shoes of varying sizes and lasts, within limits, whereby overshoes made in two or three different sizes only will suffice." The '257 patent's sole asserted advantage over the specific prior products it criticizes — "purchased using the shoe size specifically or a small range of sizes" — is therefore precisely the problem 3,724,107 and 2,281,321 already set out to solve. Design incentive is not inferred here; it is written into the art.
3. Skateboarding supplies the remaining motivation to place abrasion-protective material on the upper. Esposito explains the ollie mechanism (grip tape scraping the shoe "near and including the first shoelace hole") and the resulting lace breakage; Perez's specification adds the consumer-level motivation ("shoes… the single most expensive piece of skateboarding equipment"; "board feel"). A PHOSITA seeking to protect a skate shoe would necessarily look to an overshoe whose upper — not just its sole — is the abrasion target. That is the entire point of Esposito and Perez.
4. The combination is a mere substitution of known materials and relocation of known features. Substituting a vulcanized-rubber overshoe body (3,724,107) for the thin-pad/laminated protector of Esposito is the exchange of one known shoe-protective material for another, both recited as "flexible" and "conformal." Placing traction features on the upper rather than only on the sole is taught to be desirable by 2005/0229428 and Perez for the same reason the '257 patent gives (grip to the board).
5. The result is predictable and requires no new function. The two stretch zones each perform their ordinary function (elastic accommodation of an oversized shoe); the traction members each perform their ordinary function (friction enhancement). KSR, 550 U.S. at 416. There is no asserted, unexpected interaction between the mid-upper band, the mid-sole band, and the traction members; the specification describes them serially, not synergistically.

Anticipation-adjacent point worth noting: US 3,724,107 alone discloses the sole-elastomer, the top opening, the heel coverage, the mid-foot sole stretch zone, the fore-and-aft sole traction pattern, and the one-size/symmetrical design. Adding an upper-level elastic zone (2,281,321) plus skate-specific upper protection (Esposito) plus traction carried up onto the upper (Holcomb) completes claim 1 with four references but zero new structure.

4. Alternative combinations (independent § 103 routes)

Because § 103 requires only one valid combination, the following independent routes matter for robustness:

Combination B — Grip-pad-first, overshoe-second.
US 2014/0020267 (Perez) + US 3,724,107 + US 2,281,321.
Perez provides a removable/re-applicable skate grip pad of gum rubber, "universal… sized and configured to fit any shoe," covering the ollie, toe-wrap, side-wall and lace/eyelet areas, with a textured/"diamond plate" grip surface, plural pad pieces (1310), and thicknesses of 0.0625 in (≈1.6 mm) to 4.233 mm. The overshoe features come from 3,724,107/2,281,321. Motivation: Perez itself states the objective of protecting the "skate‑able contact surface areas" while preserving board feel; enclosing that pad within a stretchable overshoe body is a predictable packaging choice.
→ Also supplies claim 2's 0.5–5 mm thickness range (Perez's 1.6–4.2 mm falls inside it).

Combination C — Structured sole-protector first.
US 2014/0325875 (Lee) + US 3,724,107.
Lee discloses a shoe mount with a top opening receiving an existing shoe, a frontally positioned toe assembly and a rearwardly positioned heel assembly each with reinforced sidewalls on the exterior surface and lower treads increasing traction, plus "lateral printing surfaces" and "decorative mounts" for graphical designs. That is a fore/aft traction-member arrangement anchored at the front and rear of a shoe-mount, structurally the same layout claim 1 recites, and it independently supplies claim 5's logo/indicia area. Combine with 3,724,107 for the elastic overshoe body.

Combination D — Skateboard-specific art made elastic.
US 2010/0325922 (Esposito) + US 3,724,107 (or US 2,286,238/"Flexible rubber overshoe") + US 1,841,710.
Esposito already discloses the skateboarding purpose and the frontal/lace coverage, in a rubber, flexible, conformal, solid-piece body. Converting the conformal protector to a full elastic overshoe using the teaching of 3,724,107 ("single size and shape to permit use on a wide range of sizes") is a substitution of one of Esposito's own enumerated materials (Esposito lists rubber, latex-type elastic materials, and laminates) — a classic obviousness posture.

On the toe opening specifically: This is the weakest element of the claim as a novelty hook, because an open-toe/forefoot-exposing configuration is old and, more importantly, is self-evident from the claim's own purpose: the specification says the opening exists so the upper "is better form fitting… and discourage[s] any unnecessary bumps or wrinkles," and lists "a completely closed toe" as an equivalent alternative. Where a claimed feature is disclosed as optional and functionally indifferent, and the alternative is expressly acknowledged as equivalent, the limitation adds little. US 5,166,182 ("Open-ended shoe cover") is cited on the face of the patent as an open-ended cover; US 1,841,710's narrow front portion 14 over the toe likewise leaves the forefoot exposed.

5. Dependent claims

Net: if claim 1 is obvious, the entire patent is invalid, because claims 2–9 add only material selection, ranges, orientation, and ornamentation — all of which are supported elsewhere in the same art, and two of which (claims 6 and 9) suffer antecedent-basis defects.

6. Objective indicia (Graham factor 4)

The record I retrieved contains essentially no evidence of secondary considerations, and two features cut against a nexus argument:

• "One size fits all" / broad size accommodation — the '257 patent's headline advantage — is an expressly stated goal of the prior art (3,724,107: "single size and shape… wide range of sizes"; 1,841,710: "two or three different sizes only will suffice… fit all sizes and shapes of shoes"). Any commercial success attributable to universal fit therefore lacks nexus to the claims and would be entitled to little or no weight.
• Symmetry ("the skateboarder can wear said overshoe on either foot") is likewise disclosed by 3,724,107 ("symmetrical rather than right or left shoe shape").
• The Indiegogo crowdfunding listing noted in the earlier summary ("Houkie") is a marketing artifact, not evidence of copying, industry praise, or unexpected results; crowdfunding success without more does not rebut an obviousness case.
• I found no evidence of copying by a competitor, licensing, or long-felt-but-unmet need — and, given the negative litigation finding already reported, no accused infringer whose conduct could supply such evidence.

7. What the patent owner would argue, and the response

8. Candid weaknesses in the § 103 case (what I could not verify)

I want to be explicit about the evidentiary footing, since a real rejection or invalidity contention rests on the four corners of each reference, and I retrieved full text for only some:

• Fully retrieved and quoted above: US 3,724,107; US 2,281,321; US 1,841,710; US 2005/0229428 A1; US 2010/0325922 A1; US 2014/0020267 A1; US 2014/0325875 A1. The combinations in § 3–§ 4 rest primarily on these seven, which is why I built the analysis around them.
• Relied on only by title/classification (flagged ~): US 5,166,182 ("Open-ended shoe cover"). I did not retrieve its disclosure and cannot state what "open-ended" means in that document's own terms — it may refer to an open top, not an open toe. It should not be the load-bearing reference for the toe-opening limitation; US 1,841,710's narrow front portion 14 and the specification's own "completely closed toe" equivalence carry that element better, and the toe opening is the weakest novelty hook in any event.
• Not independently verified at all: US 4,825,563; US 4,780,970; US 4,693,019; US 4,713,895; US 5,251,386; US 5,996,258; US 5,396,717; US 5,315,767; US 7,383,646; US 8,453,355; US 2005/0022430; US 2009/0083993; US 2,287,769; US 1,465,504; US 2,032,793; US 4,010,558; US 2,068,238; US 2,281,321 (retrieved via a secondary reproduction, not the USPTO scan); and the design patents. Several have titles ("Non-slip overshoe," "Sports shoe protector," "Athletic shoe cover," "Shoe sole saver," "Protective shoe cover," "Convertible overshoe with tear resistant bead") that suggest they would reinforce the case, but I will not assign them specific disclosures I have not read. A complete invalidity contention would require pulling each one's claims and figures.
• Prior-art-citation legend caveat: the fetched Google Patents table renders a "*" column ("Cited by examiner") beside a subset of entries (e.g., US 5,315,767; US 5,544,910; US 2004/0074113; US 6,836,977; US 7,021,663; US 7,188,438; US 2007/0113424; US 2009/0083993; US 8,225,529; US 8,701,310; US 2011/0047829). I would not treat that column as reliable from the scraped text; the examiner/attorney of record is Jila M. Mohandesi / Dale J. Ream per the earlier summary, but the applicant-vs-examiner provenance of any individual reference should be confirmed against the USPTO "References Cited" face page before being argued.
• Claim-construction caveat: the analysis assumes "heel portion" in claim 1 refers to the upper's heel region. The specification simultaneously states that "for the purpose of this disclosure and the appended claims, a heel is deemed as part of the sole." If "heel portion" is construed as the sole's heel, then the back traction members limitation reads even more directly onto US 3,724,107's "pattern of protuberances… under the heel 15," strengthening the case. Either construction favors the challenger.

9. Bottom line

1. Claim 1 is very likely obvious under § 103. The most direct case is US 3,724,107 in view of US 2,281,321, further in view of US 2010/0325922 and US 2005/0229428: a one-piece, symmetrical, molded rubber overshoe with a mid-foot sole stretch zone and fore/aft sole traction (3,724,107), add a second, displaced localized elastic zone in the upper (2,281,321), add skateboarding-specific frontal/lace coverage (Esposito), and extend traction up onto the upper at the front and rear (Holcomb/Perez). Every element is disclosed; the motivation is supplied by the references' own stated objectives and by the skateboard-abrasion problem; the combination yields nothing more than the predictable sum of the parts.
2. Alternative, independently sufficient routes exist via US 2014/0020267 (grip-pad-first) and US 2014/0325875 (structured sole-protector-first), each combined with 3,724,107.
3. Claims 2–5, 7 and 8 add only materials, numerical ranges, orientation, and ornamentation — all obvious in view of the same art. Claims 6 and 9 are separately defective under § 112 (antecedent basis; no written description of a band "defining an opening").
4. Practical context (not repeated from the earlier sections): the patent expired 2021‑12‑12 for nonpayment, and no litigation surfaced. A § 103 analysis of this patent is therefore of retrospective/licensing-diligence interest only — but for that purpose the conclusion is robust: the claim set is weak, and the earliest lapsed date plus the crowded prior art leave little that a licensee or acquirer could rely on.

Confidence: high on the element-by-element disclosure mapping and on the motivation analysis as applied to the seven verified references; moderate on the completeness of the substitute references (US 5,166,182 and the unretrieved 1880–1989 overshoe patents), which I have deliberately not leaned on. If a formal opinion is needed, the three highest-value next steps are: (i) pull the full USPTO text of US 5,166,182 and US 3,250,025 for the toe-opening teaching; (ii) confirm the applicant/examiner provenance of each " reference on the face page; and (iii) obtain US 3,724,107's "FIG. 1" to document the instep‑arch thinning visually, since that single figure does the most work in the primary combination.