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:
Aug. 24, 1993
Filed:
Sep. 27, 1990
Applicant:
Inventors:
Kinya Mizui, Ichihara, JP;
Yoshihisa Kiso, Kuga, JP;
Tetsuo Hayashi, Kuga, JP;
Masahide Tanaka, Kuga, JP;
Assignee:
Mitsui Petrochemical Industries, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10M / ; C10M / ; C07C / ;
U.S. Cl.
CPC ...
252 / ; 252 / ; 252 68 ; 558266 ; 558265 ;
Abstract
The present invention provides lubricant oil compositions comprising polyalkylene glycol polycarbonates. The lubricant oil compositions are useful as industrial gear oils, automotive gear oils, lubricant oils for refrigerators and rolling installations. The lubricant oils exhibit excellent lubricating properties and detergency and also have mutual solubility with an ozone layer nondestructive Freon such as R-134a. The lubricants of the present invention are especially suited for refrigerator systems using a hydrogenated fluorocarbon as a refrigerant.