Patent US3261335A successfully refreshed from Google Patents.
US3261335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Outer body construction for rotary combustion engines
Assignee: Wankel GmbH
•
Filing: 1964-10-21
•
Granted: 1966-07-19
•
Expires: 1984-10-21
Abstract
No abstract record available.
Inventors
- 👤 Zimmermann Hans-Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:05
CPC Classifications
F; F02; F02B; F02B55/00; F02B55/08; F02B55/10; F02B55/12; F02B55/02; F02B55/04; F02B53/00; F02B2053/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
AN OUTER BODY CONSTRUCTION FOR A ROTARY COMBUSTION ENGINE HAVING A LIQUID COOLED ROTOR AND WHEREIN THE ENGINE WORKING CYCLES ALWAYS TAKE PLACE ADJACENT THE SAME REGION OF THE OUTER BODY SO THAT THE OUTER BODY HAS A RELATIVELY COLD REGION AND A RELATIVELY HOT REGION, A FIRST PLURALITY OF SPACED COOLING FINE PROJECTING FROM THE OUTER PERIPHERY OF SAID OUTER BODY IN THE RELATIVELY HOT REGION THEREOF WITH SAID SPACED COOLING FINS FORMING COOLING AIR PASSAGES THEREBETWEEN, A SECOND PLURALITY OF SPACED COOLING FINS PROJECTING FROM THE OUTER PERIPHERY OF SAID OUTER BODY IN THE RELATIVELY COLD REGION THEREOF, AND LIQUID COOLER MEANS DISPOSED ADJACENT TO THE RELA-
Claim 2
Dependent Claim
109 words
AN OUTER BODY CONSTRUCTION FOR A ROTARY COMBUSTION ENGINE HAVING A LIQUID COOLED ROTOR AND WHEREIN THE ENGINE WORKING CYCLES ALWAYS TAKE PLACE ADJACENT THE SAME REGION OF THE OUTER BODY SO THAT THE OUTER BODY HAS A RELATIVELY COLD REGION AND A RELATIVELY HOT REGION, A FIRST PLURALITY OF SPACED COOLING FINE PROJECTING FROM THE OUTER PERIPHERY OF SAID OUTER BODY IN THE RELATIVELY HOT REGION THEREOF WITH SAID SPACED COOLING FINS FORMING COOLING AIR PASSAGES THEREBETWEEN, A SECOND PLURALITY OF SPACED COOLING FINS PROJECTING FROM THE OUTER PERIPHERY OF SAID OUTER BODY IN THE RELATIVELY COLD REGION THEREOF, AND LIQUID COOLER MEANS DISPOSED ADJACENT TO THE RELA-
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) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |