US2729286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety control and ignition apparatus for fuel burners
Assignee: Robertshaw Controls Co
•
Filing: 1950-10-11
•
Granted: 1956-01-03
•
Expires: 1970-10-11
Abstract
No abstract record available.
Inventors
- 👤 Charles K Strobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:05
CPC Classifications
F; F24; F24C; F24C3/00; F24C3/12; F23; F23N; F23N5/00; F23N5/02; F23N5/06; F23N5/067; F24C3/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2506403A
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US2557927A
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US1051768A
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US2119084A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |