Invalidity dossier
US 8823272
Emergency lighting systems including bidirectional booster/charger circuits
Current assignee: LED-IP MANAGEMENT, LLC
Added 9/23/2026, 3:48:09 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 — US 8823272 B2
Title: Emergency lighting systems including bidirectional booster/charger circuits
Patent number / application: US 8823272 B2; Application US 13/466,324; also published as US 20130147376 A1.
Inventors: John J. Trainor, James A. McBryde, Randall L. Powers, Joseph P. Chobot.
Assignee history (per listing): Original assignee Cree, Inc.; current assignee listed as Cree Lighting USA LLC. The record also lists an assignment to Ideal Industries Lighting LLC (2019) and a security interest to FGI Worldwide LLC (2023).
Key dates: Priority date 2011-12-12; filing date 2012-05-08; publication date 2014-09-02; grant 2014-09-02; legal status Active, with adjusted expiration 2032-08-14. (The listing itself states legal status is an assumption, not a legal conclusion.)
Purpose and plain-language scope: The patent relates to emergency lighting systems and, in part, to "bidirectional booster/charger circuits." Prior-art keywords listed — voltage, input, emergency lighting, battery, lighting module — indicate the subject matter concerns supplying a lighting module from an input voltage and a battery. Classifications place it in emergency/standby power for lighting (H02J9/00–9/065), LED driver circuits including switched-mode boost topologies (H05B45/00–45/38), emergency operational modes (H05B47/172), and testing lamps/power supplies (G01R31/44, G01R31/40). The abstract is unavailable in the supplied excerpt, so the precise claimed scope cannot be described from this text.
Source: https://patents.google.com/patent/US8823272/en
What the excerpt does not establish: It does not provide the claims, abstract, or full description; therefore the exact claimed scope cannot be stated. It does not establish validity, enforceability, or the accuracy of the listed legal status, assignees, or expiration date — the listing expressly disclaims legal conclusions. It also does not provide the content of related filings (US13/676,791; US13/943,376; PCT and foreign counterparts). Per instructions, no litigation, ownership-transfer, validity, or prior-art research was performed, and no missing facts are inferred.
Generated 10/1/2026, 9:51:21 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.