Patents by Inventor Lois Lo-I Lin

Lois Lo-I Lin 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).

  • Halogenated hydrocarbon refrigerant compositions containing polymeric oil-return agents
    Patent number: 6299792
    Abstract: Refrigerant compositions containing polymeric oil-return agents which solubilize or disperse mineral and synthetic oil lubricants with hydrofluorocarbon and hydrofluorocarbon/hydrochlorofluorocarbon-based refrigerants are disclosed. These polymeric oil-return agents, such as copolymers of fluorinated and non-fluorinated methacrylates, as a small proportion of an overall refrigerant composition, permit efficient return of mineral and synthetic oil lubricants from non-compressor zones back to a compressor zone in a refrigeration system operating with hydrofluorocarbon and hydrofluorocarbon/hydrochlorofluorocarbon-based refrigerants.
    Type: Grant
    Filed: January 15, 1999
    Date of Patent: October 9, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Andrew Edward Feiring, Lois Lo-I Lin, Barbara Haviland Minor, Glenn Scott Shealy, Hans O. Spauschus