US2631656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination gas and oil burner and control system therefor
Assignee: Individual
•
Filing: 1948-10-11
•
Granted: 1953-03-17
•
Expires: 1968-10-11
Abstract
No abstract record available.
Inventors
- 👤 Richard H Siemon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:34
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/02; F23N1/025; F23D; F23D17/00; F23N2225/00; F23N2225/08; F23N2225/12; F23N2225/14; F23N2233/00; F23N2233/06; F23N2237/00; F23N2237/02; F23N2237/08; F23N5/00; F23N5/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1394807A
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US1786900A
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US1596836A
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US1722253A
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US1938335A
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US1840744A
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US2065533A
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US2003624A
Cited
US2081091A
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US2407973A
Cited
US2451661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |