US3523680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carburetor
Assignee: Ethyl Corp
•
Filing: 1968-01-29
•
Granted: 1970-08-11
•
Expires: 1988-01-29
Abstract
No abstract record available.
Inventors
- 👤 Earl Bartholomew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:56
CPC Classifications
F; F02; F02M; F02M7/00; F02M7/10; F02M7/11; F02M1/00; F02M1/08; F02M1/10; F02M11/00; F02M11/02; F02M3/00; F02M3/02; F02M3/04; F02M3/05; F02M3/08; F02M7/23; F02B; F02B1/00; F02B1/02; F02B1/04; Y; Y10; Y10S; Y10S261/00; Y10S261/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR487525A
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FR21079E
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US1781087A
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US1736239A
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US1740917A
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US1722044A
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US1868831A
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US2080440A
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US2317625A
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US2430693A
Cited
US2771282A
Cited
US2741465A
Cited
US2894734A
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US3273871A
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US3298677A
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US3279771A
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US3307837A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |