US2822535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage, direct current, power packs
Assignee: Westinghouse Electric Corp
•
Filing: 1956-10-01
•
Granted: 1958-02-04
•
Expires: 1976-10-01
Abstract
No abstract record available.
Inventors
- 👤 Arnold C Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:11
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/66; H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/10; Y; Y10; Y10S; Y10S323/00; Y10S323/903
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |