US2937259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra-high frequency heating apparatus
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1957-02-01
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Granted: 1960-05-17
•
Expires: 1977-02-01
Abstract
No abstract record available.
Inventors
- 👤 Jr John Milton De Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:31
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/6402; H05B6/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2732473A
Cited
US2831952A
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US2564675A
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US2597825A
Cited
US2716694A
Cited
US2735073A
Cited
US2794185A
Cited
US2811624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |