US2933574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit interrupters
Assignee: Westinghouse Electric Corp
•
Filing: 1954-04-26
•
Granted: 1960-04-19
•
Expires: 1974-04-26
Abstract
No abstract record available.
Inventors
- 👤 Russell E Frink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:26
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/30; H01H9/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1398981A
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US1923748A
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US2276859A
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US2616007A
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US2646482A
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US2759073A
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US2568377A
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US2668890A
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US2713101A
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US2692319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |