Patent US3660212A successfully refreshed from Google Patents.
US2902980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary motor and radial sliding vane therefor
Assignee: Individual
•
Filing: 1956-04-26
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Granted: 1959-09-08
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Expires: 1976-04-26
Abstract
No abstract record available.
Inventors
- 👤 Elmer G Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:16
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0881; F01C1/00; F01C1/30; F01C1/34; F01C1/344; F01C1/3441; F01C1/3442
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |