US3545901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor for rotary piston engines
Assignee: Wankel GmbH
•
Filing: 1969-01-27
•
Granted: 1970-12-08
•
Expires: 1989-01-27
Abstract
No abstract record available.
Inventors
- 👤 Adolf Belzner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:19
CPC Classifications
F; F02; F02B; F02B55/00; F02B55/02; F01; F01C; F01C1/00; F01C1/22; F01C21/00; F01C21/08; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1695750A
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US2117550A
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US3062599A
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US3059584A
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US3102520A
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US3193052A
Cited
US3261542A
Cited
US3436129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |