Patents by Inventor Dong Joo Mun

Dong Joo Mun has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Refrigerant mixture comprising difluoromethane and 1,1,1-trifluoroethane
    Patent number: 6231781
    Abstract: A refrigerant composition useful as a substitute for chlorodifluoromethane (CHClF2, HCFC-22). The refrigerant composition has a first constituent of difluoromethane (CH2F2, HFC-32); a second constituent of 1,1,1-trifluoroethane (CH3CF3; namely, HFC-143a); and a third constituent selected from cyclopropane (C3H6, RC-270), 1,1,1,2,3,3,3-heptafluoropropane (CF3CHFCF3, HFC-227ea), 1,1,1,2,2-pentafluoropropane (CH3CF2CF3, HFC-245cb), 1,1,1,2,3,3-hexafluoropropane (CHF2CHFCF3, HFC-236ea), butane (C4H10, R-600), bis(difluoromethyl)ether (CHF2OCHF2, HFE-134) and pentafluoroethylmethylether (CF3CF2OCH3, HFE-245).
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: May 15, 2001
    Assignee: Korea Institute of Science and Technology
    Inventors: Byung Gwon Lee, Jong Sung Lim, Young Soo Kwon, Honggon Kim, Dong Joo Mun