Invalidity dossier
US 8061867
Lighting device
Current assignee: Suzhou Lekin Semiconductor Co Ltd
Added 9/23/2026, 1:58:57 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 8061867 B2
Title: Lighting device
Source: https://patents.google.com/patent/US8061867/en
Bibliographic data (per supplied text):
- Patent number: US 8061867 B2; Application US12/805,797; pre-grant publication US20110044024A1
- Inventors: Kwang Soo Kim, Kyung Il Kong, Hwayoung Kim, Sang Jun Hong
- Original assignee: LG Innotek Co Ltd (application filed by LG Innotek Co Ltd, 2010-08-19)
- Current assignee listed: Suzhou Lekin Semiconductor Co Ltd (reassignment recorded 2021-05-25)
- Priority date: 2009-08-19 (claimed from KR1020090076953A); further Korean priorities claimed 2010-03-30 and 2010-04-05
- Filing date: 2010-08-19; Publication date: 2011-11-22; Application granted: 2011-11-22
- Anticipated expiration: 2030-08-19; legal status: Expired – Fee Related (as listed)
Purpose and plain-language scope:
The text identifies the subject matter as a "lighting device," classified chiefly under F21K9/20 (light sources using semiconductor devices as light-generating elements, with attachment means), F21S8/02–8/04 (fixed recessed and ceiling-mounted lighting), F21V13/08 (filters/photoluminescent elements combined with reflectors), and F21V17/16 (fastening by deformation or snap action, including coil springs). The listed prior-art keywords—"light emitting," "groove," "light source unit"—indicate a device in which a light source unit is seated or retained in a groove, with snap-action or spring fastening. No claim text, abstract, or detailed description is present in the supplied excerpt, so the specific claim scope is not established here.
What the excerpt does not establish:
Because only bibliographic, classification, and legal-status metadata were supplied, this overview does not establish the actual claims, their limitations, the written description, or the drawings. The excerpt provides no verified prior art beyond listed keywords, no litigation or validity findings, and no comparison to other patents. Priority and expiration dates are expressly labeled assumptions, and Google states the legal status and assignee listings are not legal conclusions. All statements above are confined to the supplied source text.
Generated 10/1/2026, 9:52:39 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.