Patent US2575738A successfully refreshed from Google Patents.
US2575738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit interrupter
Assignee: Westinghouse Electric Corp
•
Filing: 1946-12-28
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Granted: 1951-11-20
•
Expires: 1966-12-28
Abstract
No abstract record available.
Inventors
- 👤 James M Wallace
- 👤 Joseph K Kraft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:00
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/72; H01H33/75
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US693416A
Cited
US682217A
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US1991909A
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US1899605A
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US1914137A
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US1955213A
Cited
DE661181C
Cited
US1934454A
Cited
US2065802A
Cited
US2100102A
Cited
US2243038A
Cited
US2405606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |