Patent US2479381A successfully refreshed from Google Patents.
US2479381A
Expired / Lapsed
US
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Circuit interrupter
Assignee: Westinghouse Electric Corp
•
Filing: 1945-05-19
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Granted: 1949-08-16
•
Expires: 1965-05-19
Abstract
No abstract record available.
Inventors
- 👤 Leon R Ludwig
- 👤 Benjamin P Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:33
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1156542A
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US1804729A
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GB438577A
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US2075749A
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GB511364A
Cited
US2250566A
Cited
US2304529A
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US2295175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-15 | 1953-02-14 | 1953-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-15 | 1957-02-14 | 1957-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-15 | 1961-02-14 | 1961-08-16 | $7700.00 | Window Closed / Lapsed |