Patents by Inventor Daiichiro Tanaka

Daiichiro Tanaka 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).

  • Support sheet with sensitized coating of organic acid substance and organic high molecular compound particulate mixture
    Patent number: 4046941
    Abstract: A sensitized sheet for a pressure sensitive copy system is obtained by coating the surface of a support with an acceptor composition comprising a particulate mixture comprising an organic acid substance selected from the group consisting of aromatic carboxylic acids and polyvalent metal salts thereof, and an organic high molecular compound. The above coating composition may further contain an inorganic solid particle such as oxides, hydroxides and carbonates of a polyvalent metal, and other mineral pigments. The coating procedure may be carried out with use of coating means mounted on the conventional paper machines.
    Type: Grant
    Filed: August 21, 1975
    Date of Patent: September 6, 1977
    Assignees: Sanko Chemical Company Ltd., Kanzaki Paper Manufacturing Company, Ltd.
    Inventors: Toranosuke Saito, Jujiro Kohno, Daiichiro Tanaka, Shinichi Oda
  • Pressure sensitive recording papers
    Patent number: 3983292
    Abstract: In a pressure sensitive recording paper which comprises in combination: a dyestuff precursor or dyestuff precursor solution and a dyestuff acceptor composition which is capable of color formation by reaction with said dyestuff precursor, the dyestuff acceptor consists essentially of a polyvalent metal salt of 3-position-substituted salicylic acid derivatives having at least 12, preferably at least 19 carbon atoms.
    Type: Grant
    Filed: August 1, 1974
    Date of Patent: September 28, 1976
    Assignee: Sanko Chemical Company Ltd.
    Inventors: Toranosuke Saito, Daiichiro Tanaka