Patent US4084480A successfully refreshed from Google Patents.
Patent US3500798A successfully refreshed from Google Patents.
US3500798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary engine
Assignee: Individual
•
Filing: 1968-03-07
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Granted: 1970-03-17
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Expires: 1988-03-07
Abstract
No abstract record available.
Inventors
- 👤 George Charles Arnal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:06
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/02; F01C1/063; F02; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B53/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1628162A
Cited
US1695888A
Cited
US2142706A
Cited
US2222133A
Cited
US2349848A
Cited
US3301193A
Cited
US3356079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |