Patent US3405692A successfully refreshed from Google Patents.
US3405692A
Expired / Lapsed
US
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Supercharged rotary internal combustion engine
Assignee: Wankel GmbH
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Filing: 1966-07-15
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Granted: 1968-10-15
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Expires: 1986-07-15
Abstract
No abstract record available.
Inventors
- 👤 Paschke Hanns-Dieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:14
CPC Classifications
F; F02; F02B; F02B53/00; F02B53/04; F02B53/08; F02B33/00; F02B2053/005; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B2730/00; F02B2730/01; F02B2730/018; F02B3/00; F02B3/06; F02M; F02M2700/00; F02M2700/33; F02M2700/331; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3259113A
Cited
US3228183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |