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. 18, 2002
Filed:
Oct. 19, 1998
Asahi Glass Company Ltd., Tokyo, JP;
Abstract
A lubricating oil for freezers, which is made of a polyether represented by the general formula (1): R —[X—OR ] , wherein R represents an s-valent group having an aromatic nucleus, X represents a divalent group consisting of —OR — and —OR — groups (the numbers of which are q and r, respectively, on average), R represents an ethylene group which may have a methyl group or ethyl group, R represents an ethylene group having an alkoxymethyl group in which the alkoxyl group has 1 to 4 carbon atoms, and R represents an alkyl group having 1 to 10 carbon atoms, s is an integer of 1 to 6, q is 0 to 6, r is at least 0.5, and (q+r)×s is 3 to 80, and which has a high compatibility with HFC refrigerant, a high stability to the hydrolisis and a high volume resistivity.