Patents by Inventor Wakako Sakata

Wakako Sakata 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 manufacturing sulfonated aromatic polymer
    Patent number: 9228060
    Abstract: An object of the present invention is to provide a method for industrially advantageously manufacturing a sulfonated aromatic polymer while preventing a reduction in the molecular weight of the resulting sulfonated aromatic polymer. The present invention relates to a method for manufacturing a sulfonated aromatic polymer, comprising sulfonating an aromatic polymer and a sulfonating agent in the presence of a solvent of a compound containing a sulfonyl group (—SO2—).
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: January 5, 2016
    Assignee: KONISHI CHEMICAL IND. CO., LTD.
    Inventors: Tomonori Mitsuru, Yoshinori Itani, Wakako Sakata
  • METHOD FOR MANUFACTURING SULFONATED AROMATIC POLYMER
    Publication number: 20140350197
    Abstract: An object of the present invention is to provide a method for industrially advantageously manufacturing a sulfonated aromatic polymer while preventing a reduction in the molecular weight of the resulting sulfonated aromatic polymer. The present invention relates to a method for manufacturing a sulfonated aromatic polymer, comprising sulfonating an aromatic polymer and a sulfonating agent in the presence of a solvent of a compound containing a sulfonyl group (—SO2—).
    Type: Application
    Filed: December 18, 2012
    Publication date: November 27, 2014
    Inventors: Tomonori Mitsuru, Yoshinori Itani, Wakako Sakata