US2858456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power control circuitry
Assignee: Westinghouse Electric Corp
•
Filing: 1954-09-20
•
Granted: 1958-10-28
•
Expires: 1974-09-20
Abstract
No abstract record available.
Inventors
- 👤 George H Royer
- 👤 Richard L Bright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:51
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/62; H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M3/156; H02M3/1563
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2223430A
Cited
US2490026A
Cited
GB701634A
Cited
US2627039A
Cited
US2728857A
Cited
US2698392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |