Patents by Inventor Masaru Matsunishi

Masaru Matsunishi 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 purifying organic solution containing lactams
    Patent number: 5440032
    Abstract: Disclosed is a method for purifying a lactam-containing organic solution which comprises processing an organic solution containing at least one lactam with an anion exchange resin to remove an anionic surface active substance contained in said organic solution, and then extracting with water to separate an objective component contained in the organic solution to an aqueous solution.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: August 8, 1995
    Assignee: Ube Industries, Ltd.
    Inventors: Kazuhiko Hirosawa, Yasuhiro Kurokawa, Tomohiko Yamamoto, Masaru Matsunishi, Yoshihiro Nawata