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Patent US3538282A successfully refreshed from Google Patents.
US3538282A
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US
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Fluid-blast circuit interrupters with exhaust valves responsive solely to the pressure generated by an arc of excessive magnitude
Assignee: Westinghouse Electric Corp
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Filing: 1966-11-29
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Granted: 1970-11-03
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Expires: 1986-11-29
Abstract
No abstract record available.
Inventors
- 👤 Winthrop M Leeds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:06
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/88; H01H33/90; H01H33/91; H01H33/02; H01H33/53; H01H33/56; H01H33/7007; H01H2033/908
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |