US2907311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve operating mechanism of reciprocating internal combustion engines
Assignee: Individual
•
Filing: 1957-09-04
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Granted: 1959-10-06
•
Expires: 1977-09-04
Abstract
No abstract record available.
Inventors
- 👤 Waldron Frederic Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:19
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/34; F01L1/344; F01L13/00; F01L13/0015; F01L13/0036; F01L13/0047; F01L1/12; F01L1/14; F01L1/146; F01L1/18; F01L1/181; F01L1/20; F01L1/205; F01L2820/00; F01L2820/03; F01L2820/035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |