US2468451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary internal-combustion engine
Assignee: Individual
•
Filing: 1945-08-07
•
Granted: 1949-04-26
•
Expires: 1965-08-07
Abstract
No abstract record available.
Inventors
- 👤 Kutzner Roy Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:47
CPC Classifications
F; F02; F02M; F02M57/00; F02M57/04; F02B; F02B53/00; F02B2730/00; F02B2730/01; F02B2730/012; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1303745A
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US728543A
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US746870A
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US1015411A
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US991029A
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US1142440A
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US1251132A
Cited
US1302504A
Cited
GB131176A
Cited
US1563315A
Cited
US1803515A
Cited
US1928775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-25 | 1952-10-25 | 1953-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-25 | 1956-10-25 | 1957-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-25 | 1960-10-25 | 1961-04-26 | $7700.00 | Window Closed / Lapsed |