Patent US1021822A successfully refreshed from Google Patents.
US1021822A
Expired / Lapsed
US
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Screw-propeller.
Assignee: Individual
•
Filing: 1910-07-11
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Granted: 1912-04-02
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Expires: 1930-07-11
Abstract
No abstract record available.
Inventors
- 👤 Fernand Broussouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:14
CPC Classifications
B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H2001/145
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) | 1915-04-02 | 1915-10-02 | 1916-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1919-04-02 | 1919-10-02 | 1920-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1923-04-02 | 1923-10-02 | 1924-04-02 | $7700.00 | Window Closed / Lapsed |