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US2909709A
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US
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Circuit interrupter control circuits
Assignee: Westinghouse Electric Corp
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Filing: 1954-12-08
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Granted: 1959-10-20
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Expires: 1974-12-08
Abstract
No abstract record available.
Inventors
- 👤 Weldon L Metz
- 👤 Willard A Derr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:34
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/02; H02H3/06; H02H3/063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1751380A
Cited
US2011361A
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US2264280A
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US2292935A
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US2498249A
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US2375413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |