Patent US2971105A successfully refreshed from Google Patents.
Patent US2901996A successfully refreshed from Google Patents.
US2901996A
Expired / Lapsed
US
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Control apparatus for the stabilization of ships
Assignee: Muirhead and Co Ltd
•
Filing: 1953-08-17
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Granted: 1959-09-01
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Expires: 1973-08-17
Abstract
No abstract record available.
Inventors
- 👤 Bell John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:36
CPC Classifications
B; B63; B63B; B63B39/00; B63B39/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1372184A
Cited
US1703280A
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GB425034A
Cited
GB453744A
Cited
US2550220A
Cited
GB581776A
Cited
US2488286A
Cited
US2619623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |