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. 17, 1978
Filed:
Jun. 15, 1976
Applicant:
Inventors:
Assignee:
Nippon Oil Company, Ltd., Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01B / ;
U.S. Cl.
CPC ...
252 63 ; 208 14 ; 208 19 ; 252 73 ;
Abstract
An electrical insulating oil having excellent thermal stability and low-temperature properties, which consists essentially of (A) 80-99 parts by weight of refined oil having a low sulphur content and considerable aromatic content and being prepared from a distillate contained in a fraction boiling between 230.degree.-430.degree. C of a paraffin or mixed base crude oil origin, (B) 1-20 parts by weight of a refined oil prepared from a lubricating oil fraction of a mineral oil boiling between 230.degree.-460.degree. C of any crude oil origin and, if desired, (C) 0.001-1.0 part by weight of an essentially ethylene-propylene copolymer as the additive.