US2620432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heating
Assignee: Republic Steel Corp
•
Filing: 1949-11-30
•
Granted: 1952-12-02
•
Expires: 1969-11-30
Abstract
No abstract record available.
Inventors
- 👤 Norbert E Foxx
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:27
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/0075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2275763A
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US2288644A
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US2308240A
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US2428303A
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US2460687A
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US2475348A
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US2456962A
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US2575504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |