US2736788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for induction heating coil control
Assignee: Commonwealth Engineering Company of Ohio
•
Filing: 1952-12-27
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Granted: 1956-02-28
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Expires: 1972-12-27
Abstract
No abstract record available.
Inventors
- 👤 Herman R Nack
- 👤 John R Whitacre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:48
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR549363A
Cited
US2452197A
Cited
US2490104A
Cited
GB669842A
Cited
US2570311A
Cited
US2655590A
Cited
US2666841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |