Patents Represented by Attorney K. A. Harding

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  • Refrigerant compositions
    Patent number: 5294359
    Abstract: Compositions comprising difluoromethane, 1,1,1,2-tetrafluoroethane and a member selected from the group consisting of 1,1-difluoroethane, 1,1,1-trifluoroethane, propane and dimethyl ether having a vapor pressure from about 12.2 psia to about 18.4 psia at -40.degree. F., are useful as refrigerants.
    Type: Grant
    Filed: February 3, 1992
    Date of Patent: March 15, 1994
    Assignee: AlliedSignal Inc.
    Inventors: Rajiv R. Singh, David P. Wilson, Earl A. E. Lund, Ian R. Shankland