Patent US2854591A successfully refreshed from Google Patents.
US2854591A
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Switching systems
Assignee: Westinghouse Electric Corp
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Filing: 1956-08-24
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Granted: 1958-09-30
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Expires: 1976-08-24
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Immel
- 👤 Marshall P White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:17
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/50; H01H; H01H3/00; H01H3/02; H01H3/16; H01H36/00; H01H36/0073; H01H47/00; H01H47/22; H01H47/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |