Patent US2933575A successfully refreshed from Google Patents.
US2933575A
Expired / Lapsed
US
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Circuit interrupters
Assignee: Westinghouse Electric Corp
•
Filing: 1956-10-22
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Granted: 1960-04-19
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Expires: 1976-10-22
Abstract
No abstract record available.
Inventors
- 👤 Benjamin P Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:59
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/88; H01H33/90; H01H33/901; H01H33/903; H01H2033/908
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE21125E
Cited
FR715898A
Cited
DE626987C
Cited
US2111416A
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DE723208C
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DE704181C
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US2442010A
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US2551772A
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DE919955C
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 |