Patents by Inventor Kiyonari Sanekata

Kiyonari Sanekata 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).

  • Anion exchanger
    Patent number: 5180750
    Abstract: An anion exchanger consisting essentially of an aromatic polysulfone block copolymer of the formula: ##STR1## wherein Ar is ##STR2## or ##STR3## X is --SO.sub.2 --, ##STR4## --S-- or --O--, Y is --SO.sub.2 --, --S-- or --O--, Z is a single bond, --O--, --S--, --SO.sub.2 --, ##STR5## each of R.sub.1 to R.sub.9 which may be the same or different is a hydrocarbon group having from 1 to 8 carbon atoms, each of a to d is an integer of from 0 to 4, e is an integer of from 0 to 3, (f+g) is from 0 to 7, (h+i) is from 0 to 5, each of R.sub.10 and R.sub.11 is a hydrogen atom or a hydrocarbon group having from 1 to 6 carbon atoms, and each of m and n is an integer of from 2 to 200, provided m/n=100/1-1/10, and having anion exchange groups introduced to the aromatic rings of the copolymer.
    Type: Grant
    Filed: July 26, 1989
    Date of Patent: January 19, 1993
    Assignee: Asahi Glass Company Ltd.
    Inventors: Yoshio Sugaya, Ichiro Terada, Kiyonari Sanekata, Hirofumi Horie