Invalidity dossier
US 9628347
Layered request processing in a content delivery network (CDN)
Current assignee: Sandpiper CDN, LLC
Added 8/26/2026, 12:48:55 AM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US 9,628,347 B2
Title: Layered request processing in a content delivery network (CDN)
Patent number / application: US 9,628,347 B2; Application No. US 13/802,470; Publication US 2014/0173053 A1.
Inventors: Lewis Robert Varney; Laurence R. Lipstone; William Crowder; Andrew Swart; Christopher Newton.
Assignee: Original assignee Level 3 Communications LLC; current assignee listed as Sandpiper CDN LLC.
Key dates: Priority date 2012-12-13; filing date 2013-03-13; publication of application 2014-06-19; grant/publication of the patent 2017-04-18; adjusted expiration listed as 2033-04-14. Legal status: Active.
Purpose and plain-language scope: The patent concerns handling requests within a content delivery network in "layers." Based on the supplied title, prior-art keywords (request, service, services, environment, layer), and classification information, the disclosed subject matter relates to processing requests through layered service arrangements in a CDN environment. The record indicates a family spanning multiple jurisdictions, including PCT/US2013/074824 (WO2014093717A1), EP2932401B1, CA2894873C, and HK1215817B. The source also notes litigation data linked to a Texas Eastern District Court case and a first worldwide family litigation filing.
Source: https://patents.google.com/patent/US9628347/en
What the excerpt does not establish: The supplied text contains no abstract, no claim language, no detailed description, and no drawings content beyond placeholders. It therefore does not establish the specific claimed steps, the precise technical implementation of "layered request processing," any dependent-claim limitations, the cited prior art, the legal status as a binding conclusion, the accuracy of the listed assignees or dates, or the merits, scope, or outcome of any litigation. Classification entries referenced in the source are also truncated or omitted here. Statements about scope are drawn only from the title and prior-art keywords and should not be treated as claim construction.
Generated 10/1/2026, 10:03:58 PM
Cases on file (1)
Group view →Specific litigation cases in our database that name US patent 9628347. The free-form analysis below may also discuss cases beyond this list.
Litigation summary
Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.
Proceedings on file (0)
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.
Current assignee: Sandpiper CDN, LLC
No PTAB proceedings on file. This patent has not been challenged via IPR, PGR, or CBM. The absence is itself a signal — well-asserted patents eventually attract IPRs. The LLM analysis below may surface filings the ODP feed hasn’t indexed yet.
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.
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.
Prior art
Earlier patents, publications, and products that may anticipate or render the claims unpatentable.
Obviousness
Combinations of prior art that suggest the claimed invention would have been obvious under 35 U.S.C. § 103.
Extensions
Patent term adjustments, term extensions, continuations, divisionals, family members, and expiration dates.
Derivative works
Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.
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This patent in court (1)
1 tracked lawsuit name US 9628347.