Patents by Inventor Janet C. Sung

Janet C. Sung 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).

  • Ternary azeotropic compositions
    Patent number: 5250208
    Abstract: Azeotropic or azeotrope-like compositions of effective amounts of 1,1,2,2,3,3,4,4,-octofluorobutane; trans-1,2-dichloroethylene, cis-1,2-dichloroethylene, 1,1-dichloroethane, or 1,3-dichloro-1,2,2,3,3-HCFC-225cb; and an alcohol such as methanol, ethanol, or isopropanol, to form an azeotropic or azeotrope-like composition are disclosed that are useful as cleaning agents, 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: April 2, 1992
    Date of Patent: October 5, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Abid N. Merchant, Janet C. Sung
  • Azeotropic compositions of 1,1,2,2,3,3,4,4-octafluorobutane and alcohols or ketones
    Patent number: 5221493
    Abstract: Azeotropic mixtures of HFC-338pcc and an alcohol such as methanol, ethanol, isopropanol or N-propanol, or a ketone such as acetone, are disclosed that are useful as cleaning agents, refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polyolefins and polyurethanes, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, and displacement drying agents.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: June 22, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Abid N. Merchant, Allen C. Sievert, Akimichi Yokozeki, Janet C. Sung
  • Binary azeotropic compositions of 1,1,2,2,3,3,4,4-octafluorobutane and either tran-1,2-dichloroethylene, cis 1,2-dichloroethylene, or 1-1 dichloroethane
    Patent number: 5194170
    Abstract: Azeotropic or azeotrope-like compositions of effective amounts of 1,1,2,2,3,3,4,4-octafluorobutane and trans-1,2-dichloroethylene; cis-1,2-dichloroethylene; or 1,1-dichloroethane to form an azeotropic or azeotrope-like composition are disclosed that are useful as cleaning agents, 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: April 2, 1992
    Date of Patent: March 16, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Abid N. Merchant, Janet C. Sung