Patents by Inventor Hironori Sugai

Hironori Sugai 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).

  • Water-soluble microcapsules
    Patent number: 4898781
    Abstract: Water-soluble microcapsules using a water-containing hydrophilic substance as a core material and at least one member selected from the group consisting of polyvinyl alcohol and modified polyvinyl alcohols as a coating material are stably retained in a concentrated aqeuous solution and are dissolved in water or a dilute aqueous solution.
    Type: Grant
    Filed: November 9, 1987
    Date of Patent: February 6, 1990
    Assignee: Showa Denko K.K.
    Inventors: Takashi Onouchi, Hironori Sugai, Kazuo Sekiguchi, Yoshikazu Hosoda, Eiichi Yoshida