Patent US2656825A successfully refreshed from Google Patents.
US2656825A
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Controlled variable coolant system for engines
Assignee: Kiekhaefer Corp
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Filing: 1950-12-06
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Granted: 1953-10-27
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Expires: 1970-12-06
Abstract
No abstract record available.
Inventors
- 👤 Marvin E Hartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:58
CPC Classifications
F; F01; F01P; F01P3/00; F01P3/20; F01P3/202; F02; F02B; F02B61/00; F02B61/04; F02B61/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB109914A
Cited
US1361033A
Cited
US1595433A
Cited
FR565705A
Cited
US1651156A
Cited
US2277113A
Cited
US2445684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |