Patents by Inventor Douglas D. Dawn

Douglas D. Dawn 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).

  • Refrigerant fluid and method of use
    Patent number: 4926650
    Abstract: A refrigerant fluid and system containing and utilizing such fluid in which the fluid consists essentially of a mixture of trichloromonofluoromethane and 1-chloro-1,1-difluoroethane.
    Type: Grant
    Filed: May 18, 1988
    Date of Patent: May 22, 1990
    Assignee: Pennwalt Corporation
    Inventors: Douglas D. Dawn, Reinhard Radermacher