US2707258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cycloinverter
Assignee: Westinghouse Electric Corp
•
Filing: 1952-08-30
•
Granted: 1955-04-26
•
Expires: 1972-08-30
Abstract
No abstract record available.
Inventors
- 👤 John L Boyer
- 👤 Hagensick Charles Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:04
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/005; H02P; H02P23/00; H02P23/08; H02P25/00; H02P25/16; H02P25/24; H02P25/26; H02P27/00; H02P27/04; H02P27/16; H02P21/00; H02P21/06; H02P21/08; H02P21/09
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1930302A
Cited
US2077206A
Cited
US2185700A
Cited
US2213945A
Cited
US2236984A
Cited
US2264854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-25 | 1958-10-25 | 1959-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-25 | 1962-10-25 | 1963-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-25 | 1966-10-25 | 1967-04-26 | $7700.00 | Window Closed / Lapsed |