US2477781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit interrupter
Assignee: Westinghouse Electric Corp
•
Filing: 1946-10-07
•
Granted: 1949-08-02
•
Expires: 1966-10-07
Abstract
No abstract record available.
Inventors
- 👤 Benjamin P Baker
- 👤 James M Cumming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:56
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/88; H01H33/90; H01H33/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1706158A
Cited
US2141279A
Cited
US2164175A
Cited
US2214620A
Cited
US2156450A
Cited
US2261020A
Cited
US2223731A
Cited
US2412857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |