The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 24, 1978
Filed:
Jan. 28, 1977
Applicant:
Inventors:
Assignee:
Nippon Oil Co., Ltd., Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01B / ;
U.S. Cl.
CPC ...
252 63 ; 208 14 ;
Abstract
An electrical insulating oil composition having satisfactory oxidation stability, electrical properties and low-temperature performances, consisting essentially of (I) an electrical insulating oil having a sulphur content of 0.1-0.35 wt.% prepared from a paraffin or mixed base crude oil and (II) 0.001-1.0% by weight, based on said insulating oil, of an essentially amorphous ethylene-propylene copolymer having an average molecular weight of 10,000-200,000 and a propylene content of 10-70 mol%.