Patent US2967788A successfully refreshed from Google Patents.
US2967788A
Expired / Lapsed
US
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Method of impregnating wound condenser bushings with a dielectric liquid
Assignee: Federal Pacific Electric Co
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Filing: 1957-08-20
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Granted: 1961-01-10
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Expires: 1977-08-20
Abstract
No abstract record available.
Inventors
- 👤 Marc G Mathers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:56
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/26; H01B17/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
102 words
THE PROCESS OF IMPREGNATING AN ELONGATED CORE OF TIGHTLY WRAPPED PAPER WITH AN OIL, COMPRISING THE STEPS OF INTRODUCING SAID OIL IN DEGASSED CONDITION UNDER A HIGH POSITIVE PRESSURE PA AT ONE END OF SAID CORE WHILE MAINTAINING THE OTHER END OF SAID CORE UNDER A SUBSTANTIALLY LOWER PRESSURE PB FOR A PROLONGED PERIOD OF TIME, WHEREIN PN IS GREATER THAN THE PRESSURE REQUIRED TO PREVENT FORMATION OF BUBBLES IN THE OIL THAT EMERGES AT SAID OTHER END OF SAID CORE AND THEREBY TO CAUSE GASES PRESENT IN THE CORE TO DISSOLVE IN OIL AND THE MAINTAIN GASES DISSOLVED IN SAID OIL.
References Cited (Backward Citations)
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Cited
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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) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |