US2946022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical inverter circuit
Assignee: Westinghouse Electric Corp
•
Filing: 1956-11-20
•
Granted: 1960-07-19
•
Expires: 1976-11-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward M Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:16
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/5383; H02M7/53832; H02M7/53835
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2757243A
Cited
US2783384A
Cited
US2760088A
Cited
US2787712A
Cited
US2831113A
Cited
US2843815A
Cited
US2748274A
Cited
US2774878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |