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US2597825A
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Combination electric and ultrahighfrequency heating apparatus
Assignee: HOTPOINT Inc
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Filing: 1948-07-20
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Granted: 1952-05-20
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Expires: 1968-07-20
Abstract
No abstract record available.
Inventors
- 👤 George W Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:25
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/647; H05B6/6482
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2413003A
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US2491687A
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US2500752A
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US2454370A
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US2495435A
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US2480679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |