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US1389609A
Expired / Lapsed
US
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Aeroplane-propeller
Assignee: Individual
•
Filing: 1919-12-26
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Granted: 1921-09-06
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Expires: 1939-12-26
Abstract
No abstract record available.
Inventors
- 👤 George F Weiher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:48
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/32; B64C11/34; B64C11/343
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1924-09-05 | 1925-03-07 | 1925-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-09-05 | 1929-03-07 | 1929-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-09-05 | 1933-03-07 | 1933-09-06 | $7700.00 | Window Closed / Lapsed |