Patent US2628683A successfully refreshed from Google Patents.
US2628683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor means for helicopters and the like
Assignee: Individual
•
Filing: 1947-04-01
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Granted: 1953-02-17
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Expires: 1967-04-01
Abstract
No abstract record available.
Inventors
- 👤 Harold H Reuther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:19
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04; B64C27/08; B64C27/10; B64C27/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1955501A
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US2264943A
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US2464285A
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US2475293A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |