Invalidity dossier
US 8093823
Light sources incorporating light emitting diodes
Current assignee: Ilumisys Inc
Added 9/23/2026, 1:55:24 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview: US8093823B1
Title: Light sources incorporating light emitting diodes
Patent number: US8093823B1
Application number: US11/007,417
Inventors: John Ivey (recorded initially as "Ivy," corrected by assignment), Jos Timmermans, Jean C. Raymond
Original assignee: Altair Engineering Inc.
Current assignee (listed): Ilumisys Inc.
Key dates:
- Priority date: 2000-02-11 (claimed from US09/782,375)
- Filing date: 2004-12-08
- Publication/grant date: 2012-01-10
- Adjusted expiration: 2022-03-22
- Legal status: Expired – Fee Related
Purpose and plain-language scope: The patent concerns light sources that use light emitting diodes (LEDs) as the light-generating elements. The supplied classification data places it in LED light sources (F21K9/00), retrofit light sources substituting for fluorescent tubes with two fittings (F21K9/27), and related areas including attachment means, end parts and component arrangement within end parts (F21K9/272), fastening of light sources/holders (F21V19/00), coupling connectors (F21V23/06), passive heat-dissipating elements such as finned heat sinks (F21V29/70, F21V29/74), and LED driver circuits including pulse-width modulation (H05B45/30, H05B45/325). The listed prior-art keywords are "light," "light emitting," "emitting diodes," "elongate support," and "current," which indicate an elongated support structure carrying LEDs driven by current. Beyond these classifications, keywords, and bibliographic data, the supplied excerpt contains no abstract, claims, or written description, so the precise claimed scope is not established here.
Source: https://patents.google.com/patent/[US8093823](/patent/US8093823)/en (fetched 2026-09-23)
What the excerpt does not establish: It contains no claim language, no abstract, no detailed description, and no drawings text, so the specific elements claimed, the exact electrical or mechanical configuration, and the scope of protection cannot be determined from this material. Dates and legal status are expressly assumptions/not legal conclusions per the source; litigation and reassignment entries appear in the source but are outside this overview's scope.
Generated 10/1/2026, 9:52:43 PM
Cases on file (0)
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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.