Patent US2321189A successfully refreshed from Google Patents.
US2321189A
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US
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Induction heating apparatus
Assignee: Induction Heating Corp
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Filing: 1942-12-26
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Granted: 1943-06-08
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Expires: 1962-12-26
Abstract
No abstract record available.
Inventors
- 👤 Paul E Dravneek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:19
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/06; H05B6/10; H05B6/101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-06-07 | 1946-12-07 | 1947-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-06-07 | 1950-12-07 | 1951-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-06-07 | 1954-12-07 | 1955-06-08 | $7700.00 | Window Closed / Lapsed |