Patents by Inventor Hisayuki Matsuda

Hisayuki Matsuda 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).

  • Particulate spacers and liquid crystal display cells containing these spacers
    Patent number: 5130831
    Abstract: A particulate spacer for use in a liquid crystal display cell, electrochromic display device, or the like is provided. The particulate spacer comprises a core particle and a functional layer formed on the surface of the core particle.
    Type: Grant
    Filed: June 4, 1990
    Date of Patent: July 14, 1992
    Assignee: Sekisui Kagaku Kogyo Kabushiki Kaisha
    Inventors: Minoru Kohara, Kazuo Saiuchi, Kazuhiko Kanki, Hisayuki Matsuda, Shinzo Yamada, Kunikazu Yamada
  • Process for producing reduced keratinous substances using urea or thiourea
    Patent number: 4141888
    Abstract: A process for producing a reduced keratinous substance having a high adsorptive power for cationic substances, which comprises reducing a substance containing keratin as a main ingredient under alkaline conditions to cleave the disulfide linkages of the keratin, dissolving the reduced keratin in an aqueous medium containing urea or thiourea in a concentration of less than 5 moles/liter, and then acidifying the resulting solution to precipitate the dissolved reduced keratin under such conditions that the thiol side-chains present in the reduced keratin do not substantially undergo oxidation. The reduced keratinous substance is especially useful as a heavy metal ion capturing agent.
    Type: Grant
    Filed: March 6, 1978
    Date of Patent: February 27, 1979
    Assignee: Sekisui Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hisayuki Matsuda, Minoru Takahashi, Katsuro Shinoda, Sho Kikyotani, Hiroshi Inagaki