Patents by Inventor Yoshinari Kawasaki

Yoshinari Kawasaki 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 of anticorrosive treatment for soft water boilers
    Patent number: 4885136
    Abstract: A method of anticorrosive treatment for soft water boilers to prevent iron family metals from corrosion, especially from pitting corrosion, which is characterized by adding, to a boiler water system using soft water at a high temperature, (a) a specific amount of a phosphorus compound, (b) a specific amount of a carboxylic acid compound and (c) a specific amount of a metal compound.
    Type: Grant
    Filed: October 15, 1987
    Date of Patent: December 5, 1989
    Assignee: Katayama Chemical Works Co., Ltd.
    Inventors: Sakae Katayama, Hirohiko Katayama, Toshihiko Mukai, Yoshinari Kawasaki
  • Corrosion inhibitor
    Patent number: 4512552
    Abstract: A corrosion inhibitor for ferrous metals comprising four different components of (a) an inorganic acid component (such as molybdate or tungstate), (b) an aliphatic hydroxycarboxylic or aliphatic dicarboxylic acid or its salt (such as citric acid, gluconic acid or succinic acid), (c) an inorganic heavy metal compound (such as zinc chloride or stannous chloride) and (d) a water soluble polymer component having a molecular weight of 500-100,000 (such as acylic homo or copolymer), which is especially advantageous for use in water recycling system.
    Type: Grant
    Filed: November 16, 1982
    Date of Patent: April 23, 1985
    Assignee: Katayama Chemical Works Co., Ltd.
    Inventors: Sakae Katayama, Tadahiko Asano, Kazuo Marugame, Sadaoki Kanada, Yoshinari Kawasaki
  • Scale inhibiting agent
    Patent number: 4432884
    Abstract: This invention relates to a scale inhibiting agent which comprises as an essential ingredient a copolymer of an alkylolamide compound such as N-methylol acrylamide, N-hydroxyethyl acrylamide or the like and an alkenyl compound such as acrylic acid, acrylamide, ethyl acrylate or the like.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: February 21, 1984
    Assignee: Katayama Chemical Works Co., Ltd.
    Inventors: Yoshinari Kawasaki, Kenji Hanno