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. 25, 1998
Filed:
Sep. 30, 1996
Takehisa Sato, Saitama, JP;
Hironari Ueda, Saitama, JP;
Toshiaki Kuribayashi, Saitama, JP;
Satoshi Asano, Saitama, JP;
Tadashi Niwa, Saitama, JP;
Hiroshi Ueno, Saitama, JP;
Takeaki Fujii, Saitama, JP;
Sadakatsu Suzuki, Saitama, JP;
Exxon Chemical Patents Inc., Houston, TX (US);
Abstract
A lubricant and combination lubricant and refrigerant composition for use in a refrigerating machine in which a substitute freon refrigerant, which lubricant contains a polymer of a fumaric ester or a fumaric ester and a copolymerizable alkylene, and optionally contains an organic carboxylic ester or a polyalkylene glycol with a kinematic viscosity of 2 to 30 cSt. The lubricant is compatible with substitute freon refrigerants such as hydrogen-containing halogenated hydrocarbons, particularly R 134a, in a wide temperature range, has a high viscosity index, is thermally and chemically stable, and has an excellent lubricity.