Patents by Inventor Maso Takahashi

Maso Takahashi 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).

  • Filler for ink jet recording paper
    Patent number: 4915923
    Abstract: Disclosed is a filler for ink jet recording paper, said filler being composed of amorphous silica having a median diameter, measured by the coulter counter method, of 2 to 15 .mu.m, an oil absorption of at least 180 ml/100 g, a refractive index, measured by the solvent method, of at least 1.450, and a moisture absorption, measured when it is caused to absorb moisture for 200 hours at a relative humidity of 90% and a temperature of 25.degree. C., of at least 35%.
    Type: Grant
    Filed: June 9, 1988
    Date of Patent: April 10, 1990
    Assignee: Mizusawa Industrial Chemicals, Ltd.
    Inventors: Masahide Ogawa, Teiji Sato, Maso Takahashi, Toshio Kitsu, Seikichi Takahashi, Kinichi Ono