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US3452147A
Expired / Lapsed
US
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Non-condensable gas-condensable vapor cooled electrical transformer
Assignee: Westinghouse Electric Corp
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Filing: 1967-09-08
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Granted: 1969-06-24
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Expires: 1987-09-08
Abstract
No abstract record available.
Inventors
- 👤 Paul Narbut
- 👤 Curtis L Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:26
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/08; H01F27/10; H01F27/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2525457A
Cited
US2711882A
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US2717319A
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US2990443A
Cited
US3034796A
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US3275893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |