Patent US2166331A successfully refreshed from Google Patents.
US2166331A
Expired / Lapsed
US
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Apparatus for cooling fuel-valves for internal combustion engines
Assignee: Sulzer AG
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Filing: 1937-01-15
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Granted: 1939-07-18
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Expires: 1957-01-15
Abstract
No abstract record available.
Inventors
- 👤 Waeber Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:12
CPC Classifications
F; F02; F02M; F02M53/00; F02M53/04; F02M53/043; F01; F01P; F01P3/00; F01P3/12; F01P3/16; F02M55/00; F02M2700/00; F02M2700/07; F02M2700/077
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-07-17 | 1943-01-16 | 1943-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-07-17 | 1947-01-16 | 1947-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-07-17 | 1951-01-16 | 1951-07-18 | $7700.00 | Window Closed / Lapsed |