Patent US2741231A successfully refreshed from Google Patents.
US2741231A
Expired / Lapsed
US
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Thermal controls for engine cooling systems
Assignee: Outboard Marine & Manufacturing Co
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Filing: 1955-01-10
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Granted: 1956-04-10
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Expires: 1975-01-10
Abstract
No abstract record available.
Inventors
- 👤 Lucius D Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:01
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/14; F01P7/16; F01P2050/00; F01P2050/02; F01P2050/04; F01P2050/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2401646A
Cited
US2471533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-10 | 1959-10-10 | 1960-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-10 | 1963-10-10 | 1964-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-10 | 1967-10-10 | 1968-04-10 | $7700.00 | Window Closed / Lapsed |