US2612879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary internal-combustion engine
Assignee: ELMO TELLBUESCHER
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Filing: 1950-09-26
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Granted: 1952-10-07
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Expires: 1970-09-26
Abstract
No abstract record available.
Inventors
- 👤 Roger W Hibbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:05
CPC Classifications
F; F02; 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |