US1801781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Outboard propeller drive
Assignee: Individual
•
Filing: 1929-12-31
•
Granted: 1931-04-21
•
Expires: 1949-12-31
Abstract
No abstract record available.
Inventors
- 👤 Sylvanus H H Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:50
CPC Classifications
B; B63; B63H; B63H20/00; B63H20/14; B63H20/20; B63H20/22; B63H20/08; B63H20/10; B63H20/32; B63H2020/323; B63H2020/326; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19502; Y10T74/19521
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) | 1934-04-20 | 1934-10-20 | 1935-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-04-20 | 1938-10-20 | 1939-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-04-20 | 1942-10-20 | 1943-04-21 | $7700.00 | Window Closed / Lapsed |