Patent US2617399A successfully refreshed from Google Patents.
US2617399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature regulating apparatus for internal-combustion engines
Assignee: Individual
•
Filing: 1949-11-02
•
Granted: 1952-11-11
•
Expires: 1969-11-02
Abstract
No abstract record available.
Inventors
- 👤 Charles M Backus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:42
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/02; F02N19/04; F02N19/10; F01; F01M; F01M5/00; F01M5/001
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1529906A
Cited
US1613347A
Cited
US2046812A
Cited
US2074168A
Cited
GB454893A
Cited
US2257755A
Cited
US2300011A
Cited
GB545957A
Cited
US2405144A
Cited
US2405145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |