US3381205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase shift regulated electrical inverter system
Assignee: Westinghouse Electric Corp
•
Filing: 1965-09-14
•
Granted: 1968-04-30
•
Expires: 1985-09-14
Abstract
No abstract record available.
Inventors
- 👤 Homer R Howell
- 👤 Donald M Lamaster
- 👤 David L Roeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:10
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/539
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3309600A
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US3297936A
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US3295044A
Cited
US3311807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |