US2468796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for dual coil induction heating
Assignee: Ohio Crankshaft Co
•
Filing: 1944-06-17
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Granted: 1949-05-03
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Expires: 1964-06-17
Abstract
No abstract record available.
Inventors
- 👤 Alden O Wood
- 👤 John T Vaughan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:44
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1845322A
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US2052010A
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US2205424A
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US2181445A
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US2249909A
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US2328225A
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US2371459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |