Patent US2820875A successfully refreshed from Google Patents.
US2820875A
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High frequency dielectric heating apparatus
Assignee: IND ELECTRONIC ENGINEERING COR
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Filing: 1954-06-23
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Granted: 1958-01-21
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Expires: 1974-06-23
Abstract
No abstract record available.
Inventors
- 👤 Ewald R Werych
- 👤 Lawrence W Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:00
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/46; H05B6/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2283670A
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US2416172A
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US2486764A
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US2514246A
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US2497945A
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US2624830A
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US2632091A
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US2593959A
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US2596636A
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US2729732A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |