US3027439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed electric switch
Assignee: Westinghouse Electric Corp
•
Filing: 1957-01-31
•
Granted: 1962-03-27
•
Expires: 1977-01-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Chester W Upton
- 👤 Earl F Beach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:15
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/22; H01H3/30; H01H79/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2572637A
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US2669622A
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US2600304A
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US2669629A
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US2788418A
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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) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |