Patents Represented by Attorney K. K. King

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  • Azeotropic or azeotrope-like compositions of ammonia and tetrafluoroethane
    Patent number: 5700388
    Abstract: Constant boiling azeotropic or azeotrope-like compositions of ammonia and 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, difluoromethane, pentafluoroethane or 1,1,1,2,3,3,3-heptafluoropropane are disclosed that are useful as refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polyolefins and polyurethanes and as power cycle working fluids.
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: December 23, 1997
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Mark Brandon Shiflett, Akimichi Yokozeki