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Patent US3509844A successfully refreshed from Google Patents.
US3509844A
Expired / Lapsed
US
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Power steering for ships and boats
Assignee: THOMAS P DOYLE
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Filing: 1967-10-04
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Granted: 1970-05-05
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Expires: 1987-10-04
Abstract
No abstract record available.
Inventors
- 👤 Thomas P Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:02
CPC Classifications
B; B63; B63H; B63H25/00; B63H25/42; G; G05; G05D; G05D1/00; G05D1/02; G05D1/0206; G05D1/0208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |