Invalidity dossier
US 7651634
Phosphor composition and method for producing the same, and light-emitting device using the same
Current assignee: Shenzhen Jufei Optoelectronics Co Ltd
Added 9/23/2026, 11:26:11 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 — US7651634B2
Title: Phosphor composition and method for producing the same, and light-emitting device using the same
Patent number: US7651634B2 (application US12/099,584)
Inventor: Shozo Oshio
Original assignee: Panasonic Corp (listed current assignee: Shenzhen Jufei Optoelectronics Co Ltd)
Key dates (as listed; the source notes these are assumptions, not legal conclusions):
- Prior art date / priority date: 2004-04-27
- Filing date: 2008-04-08
- Publication of US20080191610A1: 2008-08-14
- Granted / published as US7651634B2: 2010-01-26
- Legal status listed: Expired – Lifetime, with anticipated expiration noted 2025-04-26
Purpose and plain-language scope: Based only on the supplied text, the patent concerns a phosphor composition, a method of making that composition, and a light-emitting device that uses it. In plain terms, it covers luminescent (phosphor) materials—substances that emit light when excited—together with the process for producing them and their incorporation into a light-emitting device. The classification data is consistent with this: the patent is grouped under luminescent materials, including inorganic luminescent materials containing alkaline earth metals (C09K11/55), rare earth metals (C09K11/77), and specifically europium (C09K11/7728), as well as non-oxide ceramics such as aluminium nitride and silicon nitride (C04B35/581, C04B35/584). That suggests the phosphor is an inorganic, rare-earth/alkaline-earth-based material, but the excerpt does not supply the actual claims or chemical formulas.
What the excerpt does not establish:
- The specific claims, phosphor formula, composition ranges, or method steps (the claims text was not supplied).
- The exact light-emitting device structure or any embodiment details, since the descriptive body was omitted.
- Whether the listed assignees are accurate; the source itself cautions that Google has not verified assignee data.
- Any priority/continuity details, other than the recorded dates above.
- Any matter concerning validity, enforceability, or prior art—not addressed here per scope.
Source: https://patents.google.com/patent/[US7651634](/patent/US7651634)/en
Generated 10/1/2026, 9:53:58 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.