Patent US3844968A successfully refreshed from Google Patents.
US3844968A
Expired / Lapsed
US
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New impregnation mixtures for electrical insulating mixtures
Assignee: Rhone Progil SA
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Filing: 1972-02-03
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Granted: 1974-10-29
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Expires: 1992-02-03
Abstract
Abstract Dielectric liquids are provided consisting essentially of a mixture of 25 - 33 parts of monochlorinated diphenyl, 28 - 36 parts of 2,4''-dichlorodiphenyl and 37 - 43 parts by weight of trichlorodiphenyl.
Inventors
- 👤 P Jay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:19
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22; H01B; H01B3/00; H01B3/18; H01B3/20; H01B3/24; H01G4/221; H01G4/222
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
50 words
A LIQUID COMPOSITION OF THE IMPREGNATION OF ELECTRICAL INSULATING MATERIALS CONSISTING ESSENTIALLY OF A MIXTURE OF 25 33 PARTS BY WEIGHT OF MONOCHLORODIPHENYL, 28 - 36 PARTS BY WEIGHT OF DICHLORODIPHENYL CONSISTING OF AT LEAST 50 PERCENT OF THE 2,4'' ISOMER, AND 37 - 43 PARTS BY WEIGHT OF TRICHLORODIPHENYL.
Claim 2
Dependent Claim
50 words
A LIQUID COMPOSITION OF THE IMPREGNATION OF ELECTRICAL INSULATING MATERIALS CONSISTING ESSENTIALLY OF A MIXTURE OF 25 33 PARTS BY WEIGHT OF MONOCHLORODIPHENYL, 28 - 36 PARTS BY WEIGHT OF DICHLORODIPHENYL CONSISTING OF AT LEAST 50 PERCENT OF THE 2,4'' ISOMER, AND 37 - 43 PARTS BY WEIGHT OF TRICHLORODIPHENYL.
Claim 3
Dependent Claim
24 words
A composition in accordance with claim 1 in which said dichlorodiphenyl consists of 65 - 85 percent by weight of said 2, 4'' isomer.
Claim 4
Dependent Claim
35 words
A composition in accordance with claim 2 wherein said dichlorodiphenyl is a diphenyl chlorination product distilling between 154* and 164*C. under a pressure of 10 mm. Hg. and containing 75 percent by weight of 2,4''-dichlorodiphenyl.
Claim 5
Dependent Claim
24 words
A composition in accordance with claim 1 further comprising 20 - 2,000 ppm based on said 100 parts by weight of a silicone oil.
Claim 6
Dependent Claim
14 words
A composition in accordance with claim 4 wherein said silicone oil is a methylphenylpolysiloxane.
Claim 7
Dependent Claim
25 words
A composition in accordance with claim 1 further comprising 0.1 - 5 percent by weight based on said 100 parts of a hydrochloric acid scavenger.
Claim 8
Dependent Claim
14 words
A composition in accordance with claim 6 wherein said scavenger is an epoxide compound.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |