Patents by Inventor Charles H. Hart

Charles H. Hart 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).

  • Patent number: 5059579
    Abstract: A thermal transfer printing (TTP) receiver sheet for use in association with a compatible donor sheet, comprises a supporting substrate having, on at least one surface thereof, (a) a dye-receptive receiving layer to receive a dye thermally transferred form the donor sheet, said receiver sheet additionally comprises, on at least one surface thereof, (b) an antistatic layer, said antistatic layer preferably being on a second surface of said substrate. The antistatic layer preferably comprises (a) a polychlorhydrin ether of an ethoxylated hydroxyamine and (b) a polyglycol amine, the total alkali metal consent of components (a) and (b) not exceeding 0.5% of the combined weight of (a) and (b).
    Type: Grant
    Filed: June 27, 1989
    Date of Patent: October 22, 1991
    Assignee: Imperial Chemical Industries PLC
    Inventors: Charles H. Hart, John Francis, Roger Waldron