US2815992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston
Assignee: American Iron & Machine Works
•
Filing: 1955-07-14
•
Granted: 1957-12-10
•
Expires: 1975-07-14
Abstract
No abstract record available.
Inventors
- 👤 Rodgers Otis Ned
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:23
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/005; F16J1/006; F16J1/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2189839A
Cited
US2306838A
Cited
US2566994A
Cited
US2443110A
Cited
US2597829A
Cited
US2687335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |