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US2847536A
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Anticipatory heater circuit for thermostat controls
Assignee: Robertshaw Controls Co
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Filing: 1956-04-17
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Granted: 1958-08-12
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Expires: 1976-04-17
Abstract
No abstract record available.
Inventors
- 👤 Chester K Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:11
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0213; G; G05; G05D; G05D23/00; G05D23/19; G05D23/30; H01; H01H; H01H37/00; H01H37/02; H01H37/12; H01H37/14; H01H37/32; H01H37/52; H01H37/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR740532A
Cited
US2092327A
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US2348206A
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US2343132A
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GB692018A
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US2692930A
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US2687610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |