Patents by Inventor Katsuhisa Shiote

Katsuhisa Shiote 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 for producing polycarboxylic acid for cement dispersant and cement composition
    Patent number: 6388038
    Abstract: The present invention provides a method for producing a cement dispersant having high percentage in water reduction rate and appropriate air-entraining property. This method for producing a polycarboxylic acid for a cement dispersant is characterized in that alkylene oxide is added at a specific temperature range.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: May 14, 2002
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Tsuyoshi Hirata, Tsutomu Yuasa, Katsuhisa Shiote, Koichiro Nagare, Syogo Iwai
  • Cement dispersant, method for producing polycarboxylic acid for cement dispersant and cement composition
    Patent number: 6174980
    Abstract: The present invention provides a method for producing a cement dispersant having high percentage in water reduction-rate and appropriate air-entraining property. This method for producing a polycarboxylic acid for a cement dispersant is characterized in that alkylene oxide is added at a specific temperature range.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: January 16, 2001
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Tsuyoshi Hirata, Tsutomu Yuasa, Katsuhisa Shiote, Koichiro Nagare, Syogo Iwai
  • Method for dispersion of cement
    Patent number: 6048916
    Abstract: A method for the dispersion of cement, which comprises incorporating in a cement composition consisting at least of cement and water a cement dispersing agent formed of a polymer obtained by polymerizing a monomer component containing an alkoxy polyalkylene glycol mono(meth)acrylic ester monomer produced by the interesterification of an alkoxy polyalkylene glycol and a (meth)acrylic ester. A cement composition comprising the cement dispersing agent, cement and water.
    Type: Grant
    Filed: April 2, 1997
    Date of Patent: April 11, 2000
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Tsuyoshi Hirata, Tsutomu Yuasa, Katsuhisa Shiote, Shogo Iwai, Koichiro Nagare, Hideyuki Tahara
  • Cement additive, its production process and use
    Patent number: 5912284
    Abstract: The present invention provides a cement additive its production process and cement composition achieving excellent slump loss prevention capability. As a cement additive, there can be a copolymer (A-1) comprising an unsaturated polyalkylene glycol ether-based monomer (I), maleic acid-based monomer (II) and other monomer (III) copolymerizable with these monomers, the monomer (I)/monomer (II)/monomer (III) weight ratio being 50-99/50-1/0-49 and the weight average molecular weight of the copolymer (A) being 10,000 to 100,000 in terms of polyethylene glycol measured by gel permeation chromatography, or a copolymer (A) with an antifoaming agent (B), wherein the copolymer (A) comprises polyalkylene glycol ether-based units and dicarboxylic acid-based units as repeating units.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: June 15, 1999
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Tsuyoshi Hirata, Tsutomu Yuasa, Katsuhisa Shiote, Syogo Iwai, Koichiro Nagare