Patent US3499427A successfully refreshed from Google Patents.
US3499427A
Expired / Lapsed
US
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Fuel-air mixture improvement apparatus for carburetors
Assignee: Individual
•
Filing: 1967-06-15
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Granted: 1970-03-10
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Expires: 1987-06-15
Abstract
No abstract record available.
Inventors
- 👤 Paul August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:48
CPC Classifications
F; F02; F02M; F02M33/00; F02B; F02B19/00; F02B19/10; F02B19/1019; F02B19/1023; F02B19/1028; F02B19/1038; F02M29/00; F02M29/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S261/00; Y10S261/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1686413A
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US1810917A
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US2040185A
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US2201014A
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US2160309A
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US2292233A
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US2760471A
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US3198423A
Cited
US3283482A
Cited
US3380245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |