US2507213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion engine warmer
Assignee: Individual
•
Filing: 1948-05-18
•
Granted: 1950-05-09
•
Expires: 1968-05-18
Abstract
No abstract record available.
Inventors
- 👤 Roy H Mcconnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:38
CPC Classifications
F; F02; F02M; F02M1/00; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/434; F02M2700/4342; F02M2700/435
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1244817A
Cited
US1561554A
Cited
US1603171A
Cited
US1646845A
Cited
US1765655A
Cited
US1932143A
Cited
US2005035A
Cited
US2067102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |