Patent US2537082A successfully refreshed from Google Patents.
US2537082A
Expired / Lapsed
US
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Fluid fuel valve and flue damper control system for furnaces
Assignee: Individual
•
Filing: 1947-08-25
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Granted: 1951-01-09
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Expires: 1967-08-25
Abstract
No abstract record available.
Inventors
- 👤 Alva L Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:34
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US66326A
Cited
US1236731A
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US1672287A
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US1677598A
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US2037363A
Cited
US2184983A
Cited
US2166834A
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US2222663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |