Patents by Inventor Akiko Tagami

Akiko Tagami 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).

  • Process for preparing an aqueous dispersion coating material and process for preparing a powder coating material
    Patent number: 6228981
    Abstract: A process for preparing an aqueous dispersion coating material containing a resin component having a softening temperature of from 10 to 250° C., which comprises: (1) a step of mixing various starting materials which will be coating film-constituting components, to obtain a blend material, (2) a step of melting and kneading the blend material at a temperature of at least the softening temperature of said resin component, to obtain a homogenized material, (3) a step of cooling and solidifying the homogenized material, followed by crushing, to obtain coarse particles, and (4) a step of wet-pulverizing the coarse particles in an aqueous dispersant, to obtain an aqueous dispersion coating material containing fine particles having an average particle size of at most 10 &mgr;m.
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: May 8, 2001
    Assignee: Dai Nippon Toryo Co., Ltd.
    Inventors: Haruhiko Okazaki, Akiko Tagami