US2689296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and method of high-frequency induction heating
Assignee: Ohio Crankshaft Co
•
Filing: 1949-06-09
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Granted: 1954-09-14
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Expires: 1969-06-09
Abstract
No abstract record available.
Inventors
- 👤 John T Sabol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:23
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/362
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2202758A
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US2182341A
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US2493950A
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US2394944A
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US2477118A
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US2493771A
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GB621081A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |