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Patent US2993973A successfully refreshed from Google Patents.
US2993973A
Expired / Lapsed
US
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Microwave oven apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1959-04-06
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Granted: 1961-07-25
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Expires: 1979-04-06
Abstract
No abstract record available.
Inventors
- 👤 Stewart C Johnson
- 👤 Willard A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:36
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/66; H05B6/666; H05B6/6402; H05B6/74; H05B6/745; H05B6/76; H05B6/766
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2571156A
Cited
US2181889A
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US2525624A
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US2526226A
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US2782292A
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US2778911A
Cited
US2788490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |