Patents by Inventor Donald Humpherson

Donald Humpherson 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).

  • Methods of producing superconductors
    Patent number: 4407062
    Abstract: A method of coating products such as metallic coil formers and wire containing the components of an intermetallic superconductive compound in which the coating is flexible at room temperatures but which has good insulating properties after heat treatment, the coating comprising a mixture of sodium silicate, chalk and China clay which reacts on heat treatment to form an insulating ceramic but which is flexible when merely dried.
    Type: Grant
    Filed: June 24, 1981
    Date of Patent: October 4, 1983
    Assignee: Imi Kynoch Limited
    Inventors: Gordon R. Sutcliffe, Stephen J. Warden, Donald Humpherson