US2458968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion heater having means to prevent fuel contamination of the ventilating air
Assignee: Stewart Warner Corp
•
Filing: 1943-11-06
•
Granted: 1949-01-11
•
Expires: 1963-11-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Lynn A Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:52
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B64D13/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1379180A
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US1567608A
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US1640728A
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US1620754A
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US1636616A
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US1936003A
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US2144129A
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US2240531A
Cited
US2270631A
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US2386746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-11 | 1952-07-12 | 1953-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-11 | 1956-07-12 | 1957-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-11 | 1960-07-12 | 1961-01-11 | $7700.00 | Window Closed / Lapsed |