Patent US3469169A successfully refreshed from Google Patents.
US3469169A
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US
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Inverter apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1967-11-29
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Granted: 1969-09-23
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Expires: 1987-11-29
Abstract
No abstract record available.
Inventors
- 👤 Leland A Schlabach
- 👤 John Rosa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:44
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/5152
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3263153A
Cited
US3340453A
Cited
US3349315A
Cited
US3388310A
Cited
US3343068A
Cited
US3406325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |