US2681046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary motor
Assignee: Individual
•
Filing: 1951-03-20
•
Granted: 1954-06-15
•
Expires: 1971-03-20
Abstract
No abstract record available.
Inventors
- 👤 Elmer G Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:24
CPC Classifications
F; F01; F01C; F01C3/00; F01C3/06; F04; F04C; F04C18/00; F04C18/48; F04C18/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US497108A
Cited
US2341231A
Cited
US1376397A
Cited
US1904374A
Cited
US1968175A
Cited
US2101051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-14 | 1957-12-14 | 1958-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-14 | 1961-12-14 | 1962-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-14 | 1965-12-14 | 1966-06-15 | $7700.00 | Window Closed / Lapsed |