US2454039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency induction heating apparatus
Assignee: General Electric Co
•
Filing: 1947-06-28
•
Granted: 1948-11-16
•
Expires: 1967-06-28
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:16
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/101; H05B6/102; H05B6/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1748465A
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US1782955A
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US1702985A
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US1712831A
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US2361517A
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US2277564A
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US2400472A
Cited
US2418056A
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US2422417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-16 | 1952-05-17 | 1952-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-16 | 1956-05-17 | 1956-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-16 | 1960-05-17 | 1960-11-16 | $7700.00 | Window Closed / Lapsed |