Patent US2668514A successfully refreshed from Google Patents.
US2668514A
Expired / Lapsed
US
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Marine propeller steering system
Assignee: Individual
•
Filing: 1948-07-30
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Granted: 1954-02-09
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Expires: 1968-07-30
Abstract
No abstract record available.
Inventors
- 👤 Harry J Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:33
CPC Classifications
B; B63; B63H; B63H3/00; B63H3/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US980156A
Cited
US1065142A
Cited
GB221483A
Cited
US2185074A
Cited
US2270301A
Cited
US2340174A
Cited
US2307039A
Cited
US2307040A
Cited
US2319435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |