US3358738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat responsive switch control
Assignee: Robertshaw Controls Co
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Filing: 1965-10-24
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Granted: 1967-12-19
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Expires: 1985-10-24
Abstract
No abstract record available.
Inventors
- 👤 William W Chambers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:10
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/70; F; F23; F23N; F23N5/00; F23N5/02; F23N5/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
IN A BURNER CONTROL SYSTEM, THE COMBINATION COMPRISING A MAIN BURNER, A PILOT BURNER DISPOSED IGNITING PROXIMITY TO SAID MAIN BURNER WHEREBY THE SAME IS IGNITED BY A PILOT BURNER FLAME, VALVE MEANS MOVABLE BETWEEN ON AND OFF POSITIONS TO CONTROL OPERATION OF SAID MAIN BURNER, ELECTRICAL MEANS FOR OPERATING SAID VALVE MEANS,
Claim 2
Dependent Claim
53 words
IN A BURNER CONTROL SYSTEM, THE COMBINATION COMPRISING A MAIN BURNER, A PILOT BURNER DISPOSED IGNITING PROXIMITY TO SAID MAIN BURNER WHEREBY THE SAME IS IGNITED BY A PILOT BURNER FLAME, VALVE MEANS MOVABLE BETWEEN ON AND OFF POSITIONS TO CONTROL OPERATION OF SAID MAIN BURNER, ELECTRICAL MEANS FOR OPERATING SAID VALVE MEANS,
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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |