Invalidity dossier
US 5852721
Method and apparatus for selectively retrieving information from a source computer using a terrestrial or satellite interface
Current assignee: JPMorgan Chase Bank NA
Added 9/24/2026, 12:16:25 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 — US5852721A
Title: "Method and apparatus for selectively retrieving information from a source computer using a terrestrial or satellite interface."
Patent number / application: US5852721A; Application US08/797,505.
Inventors: Douglas M. Dillon and Vivek Gupta.
Original assignee: Hughes Electronics Corp. Current assignee listed as JPMorgan Chase Bank NA and Hughes Network Systems LLC (the source notes listed assignees may be inaccurate).
Key dates (as listed): Priority date 1994-06-08 (assumed); filing date 1997-02-07; publication/grant date 1998-12-22; anticipated expiration 2014-06-08. Legal status: Expired – Lifetime.
Purpose / plain-language scope (from the supplied text): The patent concerns selectively retrieving information from a source computer, using either a terrestrial interface or a satellite interface. The classification entries indicate the subject matter covers satellite systems for broadband data service to individual earth stations, data linking/framing/error recovery/multiple access, data networking and packet routing, interconnecting multiple systems, wide area network/Internet access arrangements, subscriber equipment, selection among different networks, and store-and-forward/packet switching. Prior-art keywords include satellite, packet, link, terrestrial, and hybrid. This indicates a hybrid terrestrial/satellite data-retrieval scheme.
Family/litigation indicators in the source: The page states the family has litigation ("First worldwide family litigation filed") and links a Darts-ip family record; related continuations are listed (e.g., US5968129A, US6115750A, US6321268B1, US6931512B2).
What the supplied excerpt does not establish:
- The actual claims, specification, embodiments, or how selection between terrestrial and satellite is performed.
- The meaning of "hybrid" as used in the patent, beyond the keyword listing.
- Whether the listed assignees are correct, or details of any ownership transfers or legal status (the source labels these as assumptions, not legal conclusions).
- The nature, parties, or outcome of any litigation; no validity or prior-art analysis is provided.
- Any technical detail not appearing in the excerpted classification and bibliographic data.
Source: https://patents.google.com/patent/[US5852721](/patent/US5852721)/en (fetched 2026-09-24; excerpt only — consult the source for omitted text).
Generated 10/1/2026, 9:32:00 PM
Cases on file (0)
Specific litigation cases in our database that name US patent 5852721. The free-form analysis below may also discuss cases beyond this list.
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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.
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.