Invalidity dossier
US 6120007
Carburetor with color-coded interchangeable components
Current assignee: Holley Performance Products Inc
Added 9/23/2026, 8:07:23 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 6120007 A
Title: Carburetor with color-coded interchangeable components
Patent number: US 6120007 A (application US09/047,072)
Inventor: Barry Grant. Original assignee: Individual. Current assignee (as listed, per Google Patents, which notes assignee lists may be inaccurate): Holley Performance Products Inc.
Dates: Priority date 1996-02-13; priority claimed from US08/801,721 (external priority, patent US5863470A); filing date 1998-03-24; publication/grant date 2000-09-19; anticipated expiration 2017-02-14. Legal status: Expired – Lifetime.
Purpose and plain-language scope (from the supplied excerpt): The patent concerns a carburetor having interchangeable components that are color-coded. Key terms indexed in the excerpt are "sleeves," "venturi," "carburetor," "color," "bores," and "visual inspection." Classification is in F02M (supplying combustion engines with combustible mixtures), including F02M9/14 (carburetors with venturi and nozzle relatively displaceable along the venturi axis) and F02M19/08 (venturis), with a truncated subclass reference to "Venturi section being axially slidab..." Taken together, the excerpt indicates a carburetor in which interchangeable sleeves/venturi components are distinguished by color so a user can identify or select the correct part by visual inspection, rather than by measurement or machining.
What the excerpt does not establish: It supplies only the abstract-level front-page data, classifications, and keyword/chemical indices above; it does not include the claims, the written description, or any drawing text. Therefore the precise scope of the claimed invention, the specific color-to-component mapping, and the exact structure of the sleeves and bores cannot be determined from the supplied text. Nothing here establishes validity, enforceability, litigation, or the accuracy of the listed assignments; the security agreements and reassignments shown are recordation events only. Several classification entries are truncated in the excerpt.
Generated 10/1/2026, 9:41:34 PM
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Litigation summary
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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
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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.