US2707461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary engine
Assignee: Individual
•
Filing: 1950-02-08
•
Granted: 1955-05-03
•
Expires: 1970-02-08
Abstract
No abstract record available.
Inventors
- 👤 Albert P Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:19
CPC Classifications
F; F01; F01B; F01B13/00; F01B13/04; F01B13/06; F01B13/068; F02; F02B; F02B57/00; F02B57/08; F01B9/00; F01B9/04; F01B9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US915828A
Cited
US1223668A
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US1154366A
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US1170059A
Cited
US1443282A
Cited
US1625790A
Cited
US1526610A
Cited
DE489605C
Cited
US1627403A
Cited
US1696054A
Cited
US1681454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-02 | 1958-11-01 | 1959-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-02 | 1962-11-01 | 1963-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-02 | 1966-11-01 | 1967-05-03 | $7700.00 | Window Closed / Lapsed |