Patent US2726653A successfully refreshed from Google Patents.
US2726653A
Expired / Lapsed
US
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Control and ignition system for gaseous fuel burners
Assignee: Robertshaw Controls Co
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Filing: 1951-07-07
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Granted: 1955-12-13
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Expires: 1971-07-07
Abstract
No abstract record available.
Inventors
- 👤 Charles K Strobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:11
CPC Classifications
F; F24; F24C; F24C3/00; F24C3/10; F24C3/103; F24C3/12; F24C3/126; F24C3/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1971704A
Cited
US821633A
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US965162A
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US2334603A
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US2513051A
Cited
US2510624A
Cited
US2505596A
Cited
US2619952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |