US1947334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary fluid-pressure engine
Assignee: GILBERT GILKES AND GORDON Ltd
•
Filing: 1932-02-19
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Granted: 1934-02-13
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Expires: 1952-02-19
Abstract
No abstract record available.
Inventors
- 👤 Crewdson Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:45
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/02
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) | 1937-02-12 | 1937-08-14 | 1938-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-02-12 | 1941-08-14 | 1942-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-02-12 | 1945-08-14 | 1946-02-13 | $7700.00 | Window Closed / Lapsed |