Patents by Inventor Kimiyo Ohtsu

Kimiyo Ohtsu 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).

  • Copolymer of polymerizable components in naphtha oil and maleic anhydride, process for producing said copolymer, and derivatives thereof
    Patent number: 5229449
    Abstract: Copolymer of maleic anhydride and the polymerizable component of naphtha oil chiefly composed of indene and aromatic hydrocarbons having a reactive double bond, a resin modifier containing said copolymer as an effective ingredient, a dispersant containing a salt of the sulfonation product of said copolymer, an esterified product of said copolymer, and preferred processes for producing these products.
    Type: Grant
    Filed: July 9, 1992
    Date of Patent: July 20, 1993
    Assignee: Kawasaki Steel Corporation
    Inventors: Norihide Enomoto, Yoshihiro Naruse, Keiji Sugiura, Kimiyo Ohtsu, Masato Takagi
  • Copolymer of polymerizable components in naphtha oil and maleic anhydride, process for producing said copolymer, and derivatives thereof
    Patent number: 5191049
    Abstract: Copolymer of maleic anhydride and the polymerizable component of naphtha oil chiefly composed of indene and aromatic hydrocarbons having a reactive double bond, a resin modifier containing said copolymer as an effective ingredient, a dispersant containing a salt of the sulfonation product of said copolymer, an esterified product of said copolymer, and preferred processes for producing these products.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: March 2, 1993
    Assignee: Kawasaki Steel Corp.
    Inventors: Norihide Enomoto, Yoshihiro Naruse, Keiji Sugiura, Kimiyo Ohtsu, Masato Takagi
  • Dispersant and cement admixture
    Patent number: 5179170
    Abstract: The dispersant composed of a water-soluble salt of either a copolymer of a component in naphtha oil and maleic anhydride or a partial esterification product of said copolymer has improved dispersing ability and the dispersion containing this dispersant will experience only small changes with time.The cement admixture which is a salt of a copolymer of a component in naphtha oil and an unsaturated dicarboxylic acid anhydride or which has further contains a salt of the product of condensation between formaldehyde and a sulfonated aromatic hydrocarbon containing oil is an effective plasticizer and the cement mix incorporating this admixture has a satisfactory initial flow and will experience only small decrease in flowability over time.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: January 12, 1993
    Assignee: Kawasaki Steel Corporation
    Inventors: Kimiyo Ohtsu, Norihide Enomoto, Yoshihiro Naruse, Masato Takagi, Keiji Sugiura
  • Copolymer of polymerizable components in naphtha oil and maleic anhydride, process for producing said copolymers, and derivatives thereof
    Patent number: 5166275
    Abstract: Copolymer of maleic anhydride and the polymerizable component of naphtha oil chiefly composed of indene and aromatic hydrocarbons having a reactive double bond, a resin modifier containing said copolymer as an effective ingredient, a dispersant containing a salt of the sulfonation product of said copolymer, an esterified product of said copolymer, and preferred processes for producing these products.
    Type: Grant
    Filed: January 10, 1992
    Date of Patent: November 24, 1992
    Assignee: Kawasaki Steel Corporation
    Inventors: Norihide Enomoto, Yoshihiro Naruse, Keiji Sugiura, Kimiyo Ohtsu, Masato Takagi