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:
Apr. 14, 2009
Filed:
Sep. 12, 2002
Applicants:
Yasuhiro Kawaguchi, Kimitsu-gun, JP;
Nobuaki Shimizu, Kimitsu-gun, JP;
Masato Kaneko, Ichihara, JP;
Hiroshi Nagakawa, Tokyo, JP;
Inventors:
Yasuhiro Kawaguchi, Kimitsu-gun, JP;
Nobuaki Shimizu, Kimitsu-gun, JP;
Masato Kaneko, Ichihara, JP;
Hiroshi Nagakawa, Tokyo, JP;
Assignee:
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C10M 107/34 (2006.01); C09K 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A lubricating oil for compression-type refrigerator includes, as a main component, a polyoxyalkyleneglycol derivative represented by the general formula:R(OR)m-OR]nwherein R1 is a methyl group, R2 is a propylene group, R3 is a methyl group, n is an integer of 1 and m is an integer of 12 to 80, and 1,1,1,2-tetrafluoroethane. The derivative has a kinematic viscosity of 5 to 50 cSt at 100° C.