Patents Assigned to Katayama Chemical, Incorporated
  • Industrial microbicide and a method for killing microbes for industrial use
    Patent number: 5397804
    Abstract: An industrial microbicide comprising .alpha.-chlorobenzaldoxime and optionally known industrial microbicidal which is useful for antiseptis or microbicidal of papermaking water in a paper/pulp industry.
    Type: Grant
    Filed: March 19, 1993
    Date of Patent: March 14, 1995
    Assignee: Katayama Chemical Incorporated
    Inventors: Hidenori Hirashima, Yoshimasa Yamada
  • Calcium carbonate scale inhibitor having organophosphonate, water soluble acrylic or maleic copolymer and citric acid
    Patent number: 5259985
    Abstract: A scale inhibitor for a calcium-type scale, which includes ingredients of:(a) an organophosphonic acid or its salt having an scale inhibiting activity;(b) a water-soluble acrylic acid-type or maleic acid-type polymer constituted by at least two kinds of monomer unit composed of a vinyl monomer having a carboxyl group or another polar group; and(c) citric acid or its salt.
    Type: Grant
    Filed: August 26, 1991
    Date of Patent: November 9, 1993
    Assignee: Katayama Chemical, Incorporated
    Inventors: Keisho Nakanishi, Masatsune Okuma, Sakae Katayama, deceased