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:
Mar. 15, 1988
Filed:
May. 19, 1986
Applicant:
Inventor:
Takao Katayama, Ichihara, JP;
Assignee:
Idemitsu Kosan Company Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01B / ;
U.S. Cl.
CPC ...
585-66 ; 208 14 ; 208 33 ; 208212 ; 252570 ; 585-63 ;
Abstract
This invention relates to an electrical insulating oil consisting essentially of a oil having a boiling point of not less than 150.degree. C., a viscosity of 2 to 500 centistokes (at 40.degree. C.), a pour point of not more than -35.degree. C., a sulfur content of from more than 5 ppm to not more than 1,000 ppm and an aromatic hydrocarbon content (% C.sub.A) of more than 5%.