US2631576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve operating mechanism
Assignee: Fairbanks Morse and Co
•
Filing: 1947-05-12
•
Granted: 1953-03-17
•
Expires: 1967-05-12
Abstract
No abstract record available.
Inventors
- 👤 Clarence H Schowalter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:17
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1314648A
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US1287252A
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US1451648A
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US1705803A
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US1621326A
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FR611328A
Cited
GB325337A
Cited
US2263034A
Cited
US2338726A
Cited
US2371036A
Cited
US2411775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |