(19)
(11)
EP 0 020 458 A1
(12)
(43)
Date of publication:
07.01.1981
Bulletin 1981/01
(21)
Application number:
79901264.0
(22)
Date of filing:
12.09.1979
(51)
International Patent Classification (IPC):
C10M
101/
00
( . )
C09K
5/
08
( . )
H01B
3/
22
( . )
C09K
5/
00
( . )
H01B
3/
20
( . )
H01F
27/
12
( . )
(86)
International application number:
PCT/US1979/000733
(87)
International publication number:
WO 1980/000894
(
01.05.1980
Gazette 1980/10)
(84)
Designated Contracting States:
DE FR GB NL
(30)
Priority:
26.10.1978
US 19780954923
26.10.1978
US 19780954924
(71)
Applicant:
GULF RESEARCH & DEVELOPMENT COMPANY
Pittsburgh Pennsylvania 15230 (US)
(72)
Inventor:
PELLEGRINI, John P.
Pittsburgh, PA 15238 (US)
(74)
Representative:
Huskisson, Frank Mackie
FITZPATRICKS 4 West Regent Street
Glasgow G2 1RS Scotland
Glasgow G2 1RS Scotland (GB)
(54)
INSULATION OF ELECTRICAL APPARATUS WITH A SYNTHETIC TRANSFORMER OIL