Patents by Inventor Maggie Cao

Maggie Cao 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).

  • Hydrofluorocarbon refrigerant compositions for heat pump water heaters
    Patent number: 8709275
    Abstract: Hydrofluorocarbon refrigerant compositions enable the use of existing compressor technologies in heat pump water heaters in a reliable (low discharge temperatures and pressures) and efficient (high capacity and efficiency) manner. The refrigerant comprises blends of pentafluoroethane (HFC-125), difluoromethane (HFC-32), tetrafluoroethane (HFC-134a) and tetrafluoropropene (HFO-1234ze).
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: April 29, 2014
    Assignee: Honeywell International Inc.
    Inventors: Samuel F. Yana Motta, Lawrence Chin, Zhili Lu, Mark W. Spatz, Maggie Cao
  • HYDROFLUOROCARBON REFRIGERANT COMPOSITIONS FOR HEAT PUMP WATER HEATERS
    Publication number: 20120096877
    Abstract: Hydrofluorocarbon refrigerant compositions enable the use of existing compressor technologies in heat pump water heaters in a reliable (low discharge temperatures and pressures) and efficient (high capacity and efficiency) manner. The refrigerant comprises blends of pentafluoroethane (HFC-125), difluoromethane (HFC-32), tetrafluoroethane (HFC-134a) and tetrafluoropropene (HFO-1234ze).
    Type: Application
    Filed: May 3, 2010
    Publication date: April 26, 2012
    Applicant: Honeywell International Inc.
    Inventors: Samuel F. Yana Motta, Lawrence Chin, Zhili Lu, Mark W. Spatz, Maggie Cao