US2451623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine operated hot-air heater with engine demounting means
Assignee: Stewart Warner Corp
•
Filing: 1943-12-08
•
Granted: 1948-10-19
•
Expires: 1963-12-08
Abstract
No abstract record available.
Inventors
- 👤 John H Leslie
- 👤 George A Crosby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:33
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL39895C
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US1519673A
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US1779129A
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US2355631A
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US2106530A
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US2310274A
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US2235967A
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US2295177A
Cited
US2405427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |