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:
Feb. 25, 2003
Filed:
Nov. 09, 2000
Byung Gwon Lee, Seoul, KR;
Jong Sung Lim, Seoul, KR;
Kun You Park, Seoul, KR;
Moon Jo Chung, Seoul, KR;
Seong Joon Cho, Seoul, KR;
Korea Institute of Science and Technology, Seoul, KR;
Abstract
A novel refrigerant composition useful as a substitute for HCFC-22, comprising a first constituent of difluoromethane (CH F , HFC-32); a second constituent of pentafluoroethane (CHF CF , HFC-125); a third constituent of 1,1,1-trifluoroethane (CH CF , HFC-143a); a fourth constituent selected from the group consisting of cyclopropane (C H , RC-270), 1,1,1,2,3,3,3-heptafluoropropane (CF CHFCF , HFC-227ea), 1,1,1,2,2-pentafluoropropane (CH CF CF , HFC-245cb), isobutane (CH(CH ) CH , R-600a), octafluorocyclobutane (C F , RC-318), 1,1,1,2,3,3-hexafluoropropane (CHF CHFCF , HFC-236ea), butane (C H , R-600), bis(difluoromethyl)ether (CHF OCHF , HFE-134) and pentafluoroethylmethylether (CF CF OCH , HFE-245).