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:
Sep. 05, 1995
Filed:
Mar. 01, 1994
Applicant:
Inventors:
Noboru Ishida, Kawasaki, JP;
Motoshi Sunami, Tokyo, JP;
Umekichi Sasaki, Kawasaki, JP;
Tatsuyuki Ishikawa, Yokohama, JP;
Hiroshi Hasegawa, Yokohama, JP;
Assignee:
Nippon Oil Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C10M / ;
U.S. Cl.
CPC ...
252 68 ; 252 / ; 252 67 ;
Abstract
A refrigerator oil mainly comprises, as a base oil, an ester of a carboxylic acid having a specific structure represented by the formula ##STR1## and at least one kind of an epoxy compound, which refrigerator oil is excellent in electrical insulating properties, stability to hydrolysis, wear resistance, non-hydroscopicity, compatibility with a hydrogen-containing halogeno carbon refrigerant, and thrmal stability and chemical stability.