US2284139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary power unit including means and method for controlling same
Assignee: Individual
•
Filing: 1938-11-21
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Granted: 1942-05-26
•
Expires: 1958-11-21
Abstract
No abstract record available.
Inventors
- 👤 Bernhardt T Fitzpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:32
CPC Classifications
F; F01; F01B; F01B1/00; F01B1/06; F01B1/0675; F01B1/0686; F01B1/0689; F01B1/0641; F01B1/0668; F01B13/00; F01B13/04; F01B13/06; F01B13/061; F01B13/062; F03; F03C; F03C1/00; F03C1/02; F03C1/04; F03C1/0403; F03C1/0435; F03C1/0438
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) | 1945-05-25 | 1945-11-24 | 1946-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-05-25 | 1949-11-24 | 1950-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-05-25 | 1953-11-24 | 1954-05-26 | $7700.00 | Window Closed / Lapsed |