Patent US2430640A successfully refreshed from Google Patents.
US2430640A
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Induction heating system with alternately energized coaxial conductors
Assignee: Allis Chalmers Corp
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Filing: 1945-05-31
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Granted: 1947-11-11
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Expires: 1965-05-31
Abstract
No abstract record available.
Inventors
- 👤 Lauren L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:58
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1378187A
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US1631667A
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US1833617A
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US1844501A
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US1795136A
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US1744983A
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US1822539A
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GB510005A
Cited
US2181899A
Cited
US2382435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-10 | 1951-05-12 | 1951-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-10 | 1955-05-12 | 1955-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-10 | 1959-05-12 | 1959-11-11 | $7700.00 | Window Closed / Lapsed |