US3788998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorinated dielectric liquids
Assignee: Progil SARL
•
Filing: 1971-12-13
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Granted: 1974-01-29
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Expires: 1991-12-13
Abstract
Abstract DIELECTRIC LIQUIDS FOR USE IN IMPREGNATING CAPACITORS ARE DESCRIBED WHICH COMPRISE A MIXTURE OF ISOPROPYLCHLORODIPHENYLS AND OPTIONALLY CHLORODIPHENYLS CONTAINING AT LEAST 50% BY WEIGHT OF 2,4''-DICHLORODIPHENYL SUBSTITUTED AT LEAST IN PART WITH AN ISOPROPYL RADICAL AND WHEREIN THE NUMBER OF ISOPROPYL RADICALS IS BETWEEN 0.3 AND 1.5 AND THE NUMBER OF CHLORINE ATOMS IS 2, BOTH CALCULATED ON EACH MOLE OF CHLORODIPHENYL COMPOUNDS IN THE MIXTURE. A SCAVENGER SUCH AS AN OPOXIDE, OR A LOW QUANTITY OF SILICONE OIL OR A NONPOLAR DILUENT MAY BE ADDED.
Inventors
- 👤 J Coquillion
- 👤 M Coquillion
- 👤 P Jay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:40
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/20; H01B3/24; H01B3/48; H01B3/485; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22; H01G4/221; H01G4/222
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |