Patents by Inventor Shoichi Yano

Shoichi Yano 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).

  • Size composition for papermaking
    Patent number: 5201944
    Abstract: The present invention relates to a size composition which shows an excellent sizing effect in neutral to weakly acidic papermaking.Alkanol tertiary amine and fortified rosin, incorporated in the size composition of the present invention, even when prepared as dispersions using a dispersant, are extremely poor in sizing performance in the neutral pH range, whereas the size composition obtained by mixing these components in a ratio according to the present invention and dispersing them using a surfactant specified by the present invention offers an excellent sizing in the neutral to weakly acidic pH range.
    Type: Grant
    Filed: May 30, 1991
    Date of Patent: April 13, 1993
    Assignee: Harima Chemicals, Inc.
    Inventors: Tomohiko Nakata, Hirofumi Aoki, Shoichi Yano, Yoshihide Ishikawa, Masao Hamada