Patent US3378731A successfully refreshed from Google Patents.
US3378731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage substation for metropolitan areas
Assignee: Westinghouse Electric Corp
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Filing: 1965-07-26
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Granted: 1968-04-16
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Expires: 1985-07-26
Abstract
No abstract record available.
Inventors
- 👤 Daniel L Whitehead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:17
CPC Classifications
H; H02; H02B; H02B7/00; H02B7/01; H01; H01B; H01B9/00; H01B9/06; H01B9/0644; H01B9/0666; H01B9/0672; H02B13/00; H02B13/02; H02B13/035; H02B5/00; H02G; H02G5/00; H02G5/06; H02G5/063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3235774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |