US2508752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency heating of dielectric materials
Assignee: Cutler Hammer Inc
•
Filing: 1945-11-10
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Granted: 1950-05-23
•
Expires: 1965-11-10
Abstract
No abstract record available.
Inventors
- 👤 Lester D Drugmand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:01
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/46; H05B6/48; H05B6/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US595086A
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US2324525A
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US2239069A
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US2308204A
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US2346794A
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US2382435A
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US2396004A
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US2467285A
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US2470443A
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US2428702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |