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:
Jun. 20, 2017
Filed:
Sep. 27, 2013
Applicant:
Idemitsu Kosan Co., Ltd., Chiyoda-ku, JP;
Inventors:
Tadashi Kisen, Ichihara, JP;
Tomoya Matsumoto, Ichihara, JP;
Assignee:
IDEMITSU KOSAN CO., LTD., Chiyoda-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09K 5/04 (2006.01); C10M 107/32 (2006.01); C10M 171/00 (2006.01);
U.S. Cl.
CPC ...
C10M 107/32 (2013.01); C09K 5/045 (2013.01); C10M 171/008 (2013.01); C09K 2205/122 (2013.01); C09K 2205/24 (2013.01); C10M 2209/04 (2013.01); C10M 2209/043 (2013.01); C10M 2209/1033 (2013.01); C10M 2209/1045 (2013.01); C10M 2209/1055 (2013.01); C10N 2220/021 (2013.01); C10N 2220/302 (2013.01); C10N 2230/02 (2013.01); C10N 2230/06 (2013.01); C10N 2240/30 (2013.01);
Abstract
The present invention is a lubricating oil for compression-type refrigerators using a difluoromethane (R32) refrigerant. The lubricating oil for compression-type refrigerators contains a first polyvinyl ether compound that is a polymer having a structural unit of a specific structure and has a carbon/oxygen molar ratio of from 3.0 to less than 4.0.