US2493771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for induction heating of small areas
Assignee: Ohio Crankshaft Co
•
Filing: 1946-04-24
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Granted: 1950-01-10
•
Expires: 1966-04-24
Abstract
No abstract record available.
Inventors
- 👤 Otto M Marquardt
- 👤 Walter A Majeska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:07
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/365
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1052119A
Cited
FR655097A
Cited
FR715434A
Cited
GB383859A
Cited
GB444003A
Cited
US2182341A
Cited
US2378890A
Cited
US2352332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |