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. 18, 2014
Filed:
Mar. 06, 2009
Applicants:
Tokue Sato, Ichihara, JP;
Masato Kaneko, Ichihara, JP;
Harutomo Ikeda, Ichihara, JP;
Inventors:
Assignee:
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09K 5/04 (2006.01); F25B 47/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A lubricating oil composition for refrigerator is provided by adding base oil with biphenols selected from 4,4'-methylenebis(2,6-di-t-butyl-phenol), 2′2-methylenebis(4-methyl-6-t-butylphenol), 2,2′-methylenebis(4-ethyl-6-t-butylphenol) and 4,4′-butylidenebis(3-methyl-6-t-butylphenol).