US2977967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner control apparatus
Assignee: Robertshaw Controls Co
•
Filing: 1957-04-05
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Granted: 1961-04-04
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Expires: 1977-04-05
Abstract
No abstract record available.
Inventors
- 👤 Weber Victor
- 👤 William J Russell
- 👤 William J Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:14
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/1919; Y; Y10; Y10T; Y10T137/00; Y10T137/1407; Y10T137/1516; Y10T137/8593; Y10T137/86493; Y10T137/86549
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735439A
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US2048162A
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US2213844A
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US2636505A
Cited
US2684691A
Cited
US2728386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |