Patent US2920174A successfully refreshed from Google Patents.
US2920174A
Expired / Lapsed
US
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Microwave ovens
Assignee: Raytheon Co
•
Filing: 1957-06-28
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Granted: 1960-01-05
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Expires: 1977-06-28
Abstract
No abstract record available.
Inventors
- 👤 Duane B Haagensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:41
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/74; H05B6/745; H05B6/6402; H05B6/647; H05B6/6482; H05B6/76; H05B6/766
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2594971A
Cited
US2599944A
Cited
US2656535A
Cited
GB643605A
Cited
US2707235A
Cited
US2761942A
Cited
US2748239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |