US3383233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for inductively heating a workpiece formed from a highly oxidizable metal
Assignee: Park Ohio Holdings Corp
•
Filing: 1965-12-22
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Granted: 1968-05-14
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Expires: 1985-12-22
Abstract
No abstract record available.
Inventors
- 👤 Curcio Edmund Nicholas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:39
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/34; C21D1/42; B; B21; B21C; B21C29/00; B21J; B21J17/00; B21J17/02; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2698267A
Cited
US2934480A
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US2866262A
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US3282249A
Cited
US3019126A
Cited
US3313138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |