Patent US2664168A successfully refreshed from Google Patents.
US2664168A
Expired / Lapsed
US
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Adjustable airplane-helicopter airscrew
Assignee: Individual
•
Filing: 1949-07-26
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Granted: 1953-12-29
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Expires: 1969-07-26
Abstract
No abstract record available.
Inventors
- 👤 Giroz Henri Edmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:12
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04; B64C27/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1623613A
Cited
US1795334A
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US1846992A
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US1867963A
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US2230370A
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FR851766A
Cited
US2462201A
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US2475121A
Cited
US2584663A
Cited
US2484099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |