US2844140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle combustion heater
Assignee: Stewart Warner Corp
•
Filing: 1955-09-02
•
Granted: 1958-07-22
•
Expires: 1975-09-02
Abstract
No abstract record available.
Inventors
- 👤 John F Wein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:31
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/22; B60H1/2203; B60H1/2212; B61; B61D; B61D27/00; B61D27/0036; B61D27/0063; B60H2001/2268
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2268778A
Cited
US2531939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |