Patent US2800544A successfully refreshed from Google Patents.
US2800544A
Expired / Lapsed
US
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Combined pilot and ignition control device
Assignee: Robertshaw Controls Co
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Filing: 1953-04-02
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Granted: 1957-07-23
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Expires: 1973-04-02
Abstract
No abstract record available.
Inventors
- 👤 Michael J Caparone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:16
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/06; F23N5/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2582419A
Cited
US2214272A
Cited
US2367524A
Cited
US2269157A
Cited
US2372436A
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US2583795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |