Patent US2535164A successfully refreshed from Google Patents.
US2535164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control mechanism for helicopters
Assignee: Individual
•
Filing: 1947-05-31
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Granted: 1950-12-26
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Expires: 1967-05-31
Abstract
No abstract record available.
Inventors
- 👤 Charles M Seibel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:56
CPC Classifications
B; B64; B64C; B64C1/00; B64C2211/00; B64C27/00; B64C27/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1094898A
Cited
US897738A
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US1057444A
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US1109891A
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US1042311A
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US1491310A
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US1561424A
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US1828026A
Cited
US2487646A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |