Patent US2861533A successfully refreshed from Google Patents.
US2861533A
Expired / Lapsed
US
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Rudder
Assignee: WINTER HYDROCRAFT Ltd
•
Filing: 1956-05-31
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Granted: 1958-11-25
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Expires: 1976-05-31
Abstract
No abstract record available.
Inventors
- 👤 Thomas Alan Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:06
CPC Classifications
B; B63; B63H; B63H25/00; B63H25/06; B63H25/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1475031A
Cited
US2277378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |