Patents Assigned to Japan represented by Ministry of International Trade and Industry, Director-General Basic Industries Bureau
  • Hydrolyzed membrane and process for the preparation of the same
    Patent number: 5087367
    Abstract: A selectively water-permeable hydrolyzed membrane characterized in that it is mainly made of a material which can generate a carboxyl group by hydrolysis and that a part of the material is hydrolyzed to have carboxyl groups, which may be further coated with a hydrophilic polymer. The above membrane is useful as a selectively water-permeable membrane and is applicable not only to pervaporation and vapor permeation, but also to reverse osmosis, dehumidification of air and so on.
    Type: Grant
    Filed: July 21, 1989
    Date of Patent: February 11, 1992
    Assignee: Japan represented by Ministry of International Trade and Industry, Director-General Basic Industries Bureau
    Inventors: Michio Tsuyumoto, Yasushi Maeda, Hiroki Karakane