US2443669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switchgear apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1945-02-01
•
Granted: 1948-06-22
•
Expires: 1965-02-01
Abstract
No abstract record available.
Inventors
- 👤 Roy S Tusing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:24
CPC Classifications
H; H02; H02B; H02B11/00; H02B11/12; H02B11/127; H02B11/133; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/1966
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1738049A
Cited
US1863224A
Cited
US1869856A
Cited
US2295405A
Cited
US2264755A
Cited
US2364465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |