Patents by Inventor Masanov Yosioka

Masanov Yosioka 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).

  • Mixed 1,1,1,2-tetrafluoroethane and trifluoromethane refrigerants
    Patent number: 6235215
    Abstract: A mixed fluorocarbon refrigerant comprising 1,1,1,2-tetrafluoroethane and trifluoromethane provides a refrigeration temperature of −30° C. or less. The composition can also contain a refrigerator oil and an additive. The additive is selected from the group consisting of saturated hydrocarbons, unsaturated hydrocarbons and aromatic hydrocarbons.
    Type: Grant
    Filed: March 24, 1994
    Date of Patent: May 22, 2001
    Assignees: Dairei Co., Ltd.
    Inventors: Toshio Seino, Masanov Yosioka