US2831933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit interrupters
Assignee: Westinghouse Electric Corp
•
Filing: 1956-03-02
•
Granted: 1958-04-22
•
Expires: 1976-03-02
Abstract
No abstract record available.
Inventors
- 👤 Jack E Schrameck
- 👤 Richard E Kane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:54
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/28; H01H33/30; H01H33/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US112385A
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US354014A
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US513601A
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US2575719A
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US2467756A
Cited
US2578349A
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US2597126A
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US2703558A
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US2803724A
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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) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |