Patents by Inventor Ryota MOTOOKA

Ryota MOTOOKA 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 2,6-naphthalene dicarboxylic acid
    Patent number: 10544084
    Abstract: An object of the present invention is to provide a method for producing high-purity 2,6-NDA having a small alkali metal content. The present invention relates to a method for producing a high-purity 2,6-naphthalene dicarboxylic acid, comprising a purification step of washing a crude 2,6-naphthalene dicarboxylic acid having a specific surface area of 2 m2/g or more in the presence of an aqueous medium under a temperature condition of 90° C. or more and less than 200° C.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: January 28, 2020
    Assignee: UENO FINE CHEMICALS INDUSTRY, LTD.
    Inventors: Takaya Hisano, Masaki Hamaguchi, Yusuke Kita, Ryota Motooka, Chiaki Terao
  • METHOD FOR PRODUCING 2,6-NAPHTHALENE DICARBOXYLIC ACID
    Publication number: 20190127310
    Abstract: An object of the present invention is to provide a method for producing high-purity 2,6-NDA having a small alkali metal content. The present invention relates to a method for producing a high-purity 2,6-naphthalene dicarboxylic acid, comprising a purification step of washing a crude 2,6-naphthalene dicarboxylic acid having a specific surface area of 2 m2/g or more in the presence of an aqueous medium under a temperature condition of 90° C. or more and less than 200° C.
    Type: Application
    Filed: October 30, 2018
    Publication date: May 2, 2019
    Applicant: UENO FINE CHEMICALS INDUSTRY, LTD.
    Inventors: Takaya HISANO, Masaki HAMAGUCHI, Yusuke KITA, Ryota MOTOOKA, Chiaki TERAO