US2953754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor inverter circuit
Assignee: Westinghouse Electric Corp
•
Filing: 1957-05-29
•
Granted: 1960-09-20
•
Expires: 1977-05-29
Abstract
No abstract record available.
Inventors
- 👤 Jr John F Roesel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:09
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/5383; H02M7/53832; H02M7/53835; Y; Y10; Y10S; Y10S315/00; Y10S315/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB536516A
Cited
US2783384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |