US2806652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water heater controls and safety device therefor
Assignee: Robertshaw Controls Co
•
Filing: 1954-10-15
•
Granted: 1957-09-17
•
Expires: 1974-10-15
Abstract
No abstract record available.
Inventors
- 👤 Arden Thomas Tracy
- 👤 Jackson Wilbur Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:27
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/08; F23N2225/00; F23N2225/08; F23N2225/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1421692A
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US2102752A
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US2383401A
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US2576675A
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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) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |