Patent US2850004A successfully refreshed from Google Patents.
US2850004A
Expired / Lapsed
US
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High capacity combustion heater
Assignee: Stewart Warner Corp
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Filing: 1954-12-21
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Granted: 1958-09-02
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Expires: 1974-12-21
Abstract
No abstract record available.
Inventors
- 👤 Gordon J Fairbanks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:44
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/22; B60H1/2203; B60H1/2212; B60H2001/2268
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |