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:
Oct. 21, 1986
Filed:
Feb. 28, 1985
Applicant:
Inventors:
Atsushi Sato, Tokyo, JP;
Keiji Endo, Yokosuka, JP;
Shigenobu Kawakami, Ichikawa, JP;
Hitoshi Yanagishita, Yokohama, JP;
Shozo Hayashi, Yokohama, JP;
Assignee:
Nippon Petrochemicals Company, Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01G / ; H01B / ;
U.S. Cl.
CPC ...
361315 ; 174 / ; 174 / ; 252570 ; 361323 ; 361327 ; 585-63 ; 585-66 ; 585 25 ; 585435 ; 585436 ; 585440 ;
Abstract
An improved electrical insulating oil which is stable in refining treatment and good electrical properties are maintained under high temperature conditions, and oil-filled electrical appliances impregnated therewith. The electrical insulating oil comprises 1,1,-diarylalkenes which are represented by the following general formula (I): ##STR1## wherein R.sub.1 to R.sub.4 's are the same or different and each of them is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and m and n are integers from 0 to 3, inclusive.