Patents by Inventor Misaki Kanazawa

Misaki Kanazawa 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 separating and recovering an acid
    Patent number: 5300228
    Abstract: A method for separating and recovering an acid, which comprises contacting to one side of a diffusion dialysis membrane an acid solution containing an acid having an acid radical with a formula weight of at most 200 and impurities and to the other side of the membrane water or a dilute acid solution, to separate and recover the acid in the solution, wherein the diffusion dialysis membrane comprises a cation exchange membrane having certain specific properties or comprises a main layer of an anion exchanger and a surface layer of the cation exchange membrane having certain specific properties formed on the main layer at the side of which is contact with the acid solution.
    Type: Grant
    Filed: June 5, 1992
    Date of Patent: April 5, 1994
    Assignee: Asahi Glass Company Ltd.
    Inventors: Yoshio Sugaya, Misaki Kanazawa, Haruhisa Miyake