Patent US278131A successfully refreshed from Google Patents.
US2433451A
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Cooling device for the oil systems of internal-combustion engines
Assignee: Individual
•
Filing: 1943-12-10
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Granted: 1947-12-30
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Expires: 1963-12-10
Abstract
No abstract record available.
Inventors
- 👤 Green William Ernest
- 👤 Martin-Hurst William F Forrest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:31
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/02; F01P7/10; F01P7/12; F01M; F01M5/00; F01M5/005; F01M5/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-29 | 1951-06-30 | 1951-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-29 | 1955-06-30 | 1955-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-29 | 1959-06-30 | 1959-12-30 | $7700.00 | Window Closed / Lapsed |