Patent US940743A successfully refreshed from Google Patents.
US940743A
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US
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Propeller.
Assignee: WALTER FRANCIS BLAKE
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Filing: 1909-02-18
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Granted: 1909-11-23
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Expires: 1929-02-18
Abstract
No abstract record available.
Inventors
- 👤 Ozro P Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:48
CPC Classifications
B; B63; B63H; B63H1/00; B63H1/02; B63H1/04; B63H1/06; B63H1/08; B63H5/00; B63H5/02
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) | 1912-11-22 | 1913-05-24 | 1913-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-11-22 | 1917-05-24 | 1917-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-11-22 | 1921-05-24 | 1921-11-23 | $7700.00 | Window Closed / Lapsed |