Patents by Inventor Matsukuma Daisaku

Matsukuma Daisaku 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).

  • Ink jet recording sheet
    Patent number: 4442172
    Abstract: Ink jet recording sheet comprising more than 1 g/m.sup.2 (as solid content) of water-soluble polymer coated onto the surface of a base sheet comprising uniformly 15-45 wt. parts of synthetic silicate 0.1-1 wt. part of a wet strength additive and 2-10 wt. parts of a particular glass fiber with respect to 100 wt. parts of wood pulp. This ink jet recording sheet provides superior ink absorbency and high recording density without feathering and also has superior stiffness and dimensional stability.
    Type: Grant
    Filed: July 2, 1982
    Date of Patent: April 10, 1984
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Hiroyo Oshima, Matsukuma Daisaku, Kojima Yutaka, Kobayashi Yukio, Nagai Koichi