Patent US3474343A successfully refreshed from Google Patents.
US3474343A
Expired / Lapsed
US
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Current monitoring power regulator for microwave oven
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1966-12-12
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Granted: 1969-10-21
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Expires: 1986-12-12
Abstract
No abstract record available.
Inventors
- 👤 Leonard S Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:16
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/66; H05B6/68; H02; H02H; H02H7/00; H02H7/20; H02H9/00; H02H9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3317699A
Cited
US3365675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |