Patents by Inventor Ravjiv R. Singh

Ravjiv R. Singh 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).

  • Heat transfer fluid comprising difluoromethane and carbon dioxide
    Patent number: 7238299
    Abstract: Disclosed are heat transfer fluids which possess a highly desirable and unexpectedly superior combination of properties, and heat transfer systems and methods based on these fluids. The heat transfer fluid comprise from about 30 to about 70 percent, on a molar basis, of carbon dioxide (CO2) and from about 30 to about 70 percent, on a molar basis, of hydrofluorocarbon (HFC), preferably HFC having one to two carbon atoms, and even more preferably difluoromethane (HFC-32). The preferred fluids of the present invention have a vapor pressure of at least about 100 psia at 40° F. and are also preferably not azeotropic.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: July 3, 2007
    Assignee: Honeywell International Inc.
    Inventors: Ravjiv R. Singh, Hang T. Pham, Martin R. Paonessa
  • Heat transfer fluid comprising difluoromethane and carbon dioxide
    Publication number: 20040084652
    Abstract: Disclosed are heat transfer fluids which possess a highly desirable and unexpectedly superior combination of properties, and heat transfer systems and methods based on these fluids. The heat transfer fluid comprise from about 30 to about 70 percent, on a molar basis, of carbon dioxide (CO2) and from about 30 to about 70 percent, on a molar basis, of hydrofluorocarbon (HFC), preferably HFC having one to two carbon atoms, and even more preferably difluoromethane (HFC-32). The preferred fluids of the present invention have a vapor pressure of at least about 100 psia at 40° F.
    Type: Application
    Filed: November 1, 2002
    Publication date: May 6, 2004
    Inventors: Ravjiv R. Singh, Hang T. Pham, Martin R. Paonessa