US2021569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine temperature control apparatus
Assignee: Individual
•
Filing: 1933-12-01
•
Granted: 1935-11-19
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Expires: 1953-12-01
Abstract
No abstract record available.
Inventors
- 👤 Merl F Pasco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:51
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/14; F01P11/20; F01M; F01M5/00; F01M5/02; F01M5/021; F01P7/00; F01P7/14; F01P2060/00; F01P2060/18; F01P5/00; F01P5/02; F01P5/04; F01P5/043; F23; F23N; F23N2233/00; F23N2233/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-11-18 | 1939-05-20 | 1939-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-18 | 1943-05-20 | 1943-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-18 | 1947-05-20 | 1947-11-19 | $7700.00 | Window Closed / Lapsed |