Patent US2343242A successfully refreshed from Google Patents.
US3477210A
Expired / Lapsed
US
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Hydrocarbon vapor control means for use with engine carburetor
Assignee: Universal Oil Products Co
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Filing: 1968-08-12
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Granted: 1969-11-11
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Expires: 1988-08-12
Abstract
No abstract record available.
Inventors
- 👤 George L Hervert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:23
CPC Classifications
F; F02; F02M; F02M25/00; F02M25/08; F02M25/0854; Y; Y10; Y10S; Y10S55/00; Y10S55/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3191587A
Cited
US2925879A
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US3015367A
Cited
US3082481A
Cited
US3115873A
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US3221724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |