Invalidity dossier

US 9660876

Collector mechanisms in a content delivery network

Current assignee: Sandpiper CDN, LLC

Added 8/26/2026, 12:48:56 AM

At a glanceNo PTAB challenges2 lawsuits on fileasserted by Sandpiper CDN, LLC

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Patent summary

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

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Patent Overview — US 9,660,876 B2

Title: Collector mechanisms in a content delivery network

Patent number: US9660876B2

Assignee / original assignee: Current assignee listed as Sandpiper CDN LLC; original assignee Level 3 Communications LLC.

Key dates (as listed, and characterized in the source as assumptions rather than legal conclusions):

  • Prior art date / priority date: 2012-12-13
  • Application number: US14/303,314; filing date: 2014-06-12
  • Publication of US20140337461A1: 2014-11-13
  • Grant / publication of US9660876B2: 2017-05-23
  • Anticipated expiration: 2033-03-13
  • Legal status: Active

Inventors: Laurence R. Lipstone, William Crowder, Andrew Swart, Christopher Newton, Lewis Robert Varney.

Purpose and plain-language scope: The supplied text identifies the invention only by its title and classification data. It does not include an abstract, claims, or a written description. On the face of the excerpt, the patent concerns "collector mechanisms" operating within a content delivery network (CDN). The listed prior-art keywords — service, services, event, cdn, resource — indicate that the disclosed subject matter relates to collecting or handling service and event information about resources in a CDN environment. No further detail about how collectors are implemented, configured, or used can be stated from this excerpt without inventing it.

Procedural history in the excerpt: Assigned to Level 3 Communications, LLC (recorded 2014-07-15); reassigned to Sandpiper CDN, LLC (recorded 2024-07-09). The source also notes litigation flags (a first worldwide family litigation filing and a US case in Texas Eastern District Court, case 2:24-cv-00886), presented as third-party data with disclaimers. Classification entries are truncated ("H &md").

What this excerpt does not establish: It contains no claims, abstract, detailed description, or drawings text, so the actual claimed scope is unknown. It provides no information on validity, enforceability, claim construction, or the merits of any proceeding. Litigation and assignment entries are recorded metadata, not legal conclusions. Dates marked as assumptions in the source should not be treated as adjudicated.

Source: https://patents.google.com/patent/US9660876/en

Generated 10/1/2026, 10:03:58 PM

Cases on file (2)

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Specific litigation cases in our database that name US patent 9660876. The free-form analysis below may also discuss cases beyond this list.

Litigation summary

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Proceedings on file (0)

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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.

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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

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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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This patent in court (2)

2 tracked lawsuits name US 9660876.