Patent US2666836A successfully refreshed from Google Patents.
US2666836A
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US
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Electric controller for heating elements
Assignee: Individual
•
Filing: 1950-09-05
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Granted: 1954-01-19
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Expires: 1970-09-05
Abstract
No abstract record available.
Inventors
- 👤 Stiebel Theodor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:17
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0216
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1884232A
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US1963655A
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US1912921A
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US2002692A
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US2104848A
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US2435530A
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US2310543A
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US2562399A
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US2437262A
Cited
US2517253A
Cited
US2509747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |