Invalidity dossier

US 10894355

Resin solidification substrate and assembly

Current assignee: Global Filtration Systems Inc

Added 10/31/2026, 12:00:19 AM

At a glanceActive PTAB challengeNo litigation on file

Active provider: DeepSeek · deepseek-flash

Patent summary

Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.

✓ Generated

Patent Overview: US 10,894,355 B2

Title: Resin Solidification Substrate and Assembly

Patent number: US 10,894,355 B2 (application US 15/288,348; pre-grant publication US 2017/0021562 A1)

Inventor(s): Ali El-Siblani; Alexandr Shkolnik

Original assignee: Global Filtration Systems Inc. (Google Patents also lists Sprintray Inc. as a current assignee, with the caveat that listed assignees may be inaccurate.)

Dates (per the source, which labels priority as an assumption):

  • Priority date: 2009-10-19
  • Filing date: 2016-10-07
  • Publication of pre-grant application: 2017-01-26
  • Grant/publication date: 2021-01-19
  • Adjusted expiration: 2033-08-10

Purpose and plain-language scope (limited by what the excerpt shows): The patent concerns a substrate, and an assembly incorporating it, on which resin is solidified. The only claim content visible in the supplied text is the title and the "prior art keywords" keyword list — film, solidification substrate, rigid, assembly, solidification — which indicates the subject matter involves a film-based (rather than rigid) solidification substrate within an assembly for resin solidification, as used in layer-by-layer or additive manufacturing (3D printing) contexts. The excerpt does not contain claim language or the written description, so no claim-by-claim scope, term definitions, embodiments, or specific configurations can be stated from this source. Readers should consult the full patent text for the actual claims.

Source: https://patents.google.com/patent/US10894355/en (fetched 2026-10-31; the Google Patents page itself notes that legal status, priority, and assignee listings are assumptions and not legal conclusions).

What the excerpt does not establish:

  • The actual claims (independent or dependent), their limitations, or claim scope.
  • The detailed description, figures, or embodiments.
  • The specific prior art relied upon or the basis for allowance.
  • Inventorship disputes, ownership history, or the effect of any later assignment (beyond the listed assignee names).
  • Validity, enforceability, or freedom to operate.
  • Whether the listed litigation entries (California N.D. and Delaware D. cases) are relevant, since litigation and ownership transfers were outside the requested analysis.

Per the operating rules, no outside research, prior-art analysis, or validity assessment has been performed; statements above are confined to the supplied excerpt.

Generated 10/31/2026, 12:00:49 AM

Cases on file (0)

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Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

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Proceedings on file (1)

All PTAB activity →

AIA trial proceedings (IPR / PGR / CBM) filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced from the USPTO Open Data Portal and refreshed every six hours; each proceeding number deep-links to the PTAB E2E docket.

1 active
Pending
Filed
Oct 30, 2026
Last modified
Oct 30, 2026
Petitioner
Shining 3D Tech Co., Ltd. et al.
Inventor
Ali El-Siblani et al

PTAB challenges

AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.

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Assignment history

Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.

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Prior art

Earlier patents, publications, and products that may anticipate or render the claims unpatentable.

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Obviousness

Combinations of prior art that suggest the claimed invention would have been obvious under 35 U.S.C. § 103.

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Extensions

Patent term adjustments, term extensions, continuations, divisionals, family members, and expiration dates.

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Derivative works

Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.

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