Patents by Inventor Seiki Yoshioka

Seiki Yoshioka 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).

  • Method for producing polyester resin
    Patent number: 8263728
    Abstract: A method for producing polyester resin includes: esterifying an alcoholic component, and an acid component containing polyvalent carboxylic acid and/or an ester-forming derivative thereof in a reaction solution. A condition of reaction pressure is changed from a pressurized state to a normal pressure state, or to a depressurized state under a condition (I) that an acid-based extent of reaction of the esterification is 76-94%, and a condition (II) that an undissolved acid component is present in the reaction solution.
    Type: Grant
    Filed: November 26, 2009
    Date of Patent: September 11, 2012
    Assignee: Kao Corporation
    Inventors: Yuichi Kono, Kazuma Yoshida, Hidekazu Yawata, Seiki Yoshioka, Shinpei Oota
  • METHOD FOR PRODUCING POLYESTER RESIN
    Publication number: 20110237771
    Abstract: A method for producing polyester resin includes: esterifying an alcoholic component, and an acid component containing polyvalent carboxylic acid and/or an ester-forming derivative thereof in a reaction solution. A condition of reaction pressure is changed from a pressurized state to a normal pressure state, or to a depressurized state under a condition (I) that an acid-based extent of reaction of the esterification is 76-94%, and a condition (II) that an undissolved acid component is present in the reaction solution.
    Type: Application
    Filed: November 26, 2009
    Publication date: September 29, 2011
    Applicant: KAO CORPORATION
    Inventors: Yuichi Kono, Kazuma Yoshida, Hidekazu Yawata, Seiki Yoshioka, Shinpei Oota