Patents by Inventor Mamoru Matsunaga

Mamoru Matsunaga 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).

  • Titanium dioxide pigment and process for producing same
    Patent number: 4405376
    Abstract: This invention provides a titanium dioxide pigment improved in durability and dispersibility which a comprises pigmentary titanium dioxide core particle, an inner coating of hydrous oxides of tin and zirconium and an outer coating of hydrous oxide of aluminum, and a process for producing said titanium dioxide pigment.
    Type: Grant
    Filed: November 16, 1981
    Date of Patent: September 20, 1983
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventors: Mamoru Matsunaga, Teruo Usami, Haruo Okuda, Hideo Futamata