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US2838643A
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US
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Automatic temperature control for electric heaters
Assignee: Cutler Hammer Inc
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Filing: 1954-07-02
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Granted: 1958-06-10
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Expires: 1974-07-02
Abstract
No abstract record available.
Inventors
- 👤 William H Elliot
- 👤 Edwin X Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:57
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/2451; G05D23/2456
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1994076A
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US2272492A
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US2440682A
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US2429453A
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US2511981A
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US2490965A
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US2585005A
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US2646544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |