US2845909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary piston engine
Assignee: Individual
•
Filing: 1955-02-18
•
Granted: 1958-08-05
•
Expires: 1975-02-18
Abstract
No abstract record available.
Inventors
- 👤 Pitkanen Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:31
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/24; F01C1/28; F01C1/08; F01C1/12; F01C1/126; F02; F02B; F02B53/00; F02B53/04; F02B53/08; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
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) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |