Patents by Inventor Keishirou Okamoto

Keishirou Okamoto 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).

  • High-strength hydraulic cement compositions
    Patent number: 7265168
    Abstract: A high-strength hydraulic cement composition contains cement, fine aggregates, coarse aggregates, water and a specified admixture and has a unit amount of water in the range of 120-185 kg/m3. Water and the cement are contained at a ratio of 20-40% and the admixture is contained in the amount of 0.1-3.0 weight parts per 100 weight parts of the cement. The admixture is one or more selected from reaction mixtures obtained by specified two processes and partially or completely neutralized substances obtained from such a reaction mixture through these two processes and also a specified third process.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: September 4, 2007
    Assignees: Takenaka Corporation, Takemoto Yushi Kabushiki Kaisha
    Inventors: Kenrou Mitsui, Masarou Kojima, Keishirou Okamoto, Toshio Yonezawa, Mitsuo Kinoshita, Masahiro Iida, Kazuhide Saitou, Shinji Tamaki
  • Ultra high-strength hydraulic cement compositions
    Patent number: 7259197
    Abstract: An ultra high-strength hydraulic cement composition contains a binder, fine aggregates, coarse aggregates, an antifoaming agent, water and a specified admixture and has a unit amount of the binder in the range of 480-1800 kg/m3. Water and the binder are contained at a ratio of 10-25% and the admixture is contained in the amount of 0.2-3.5 weight parts per 100 weight parts of the binder. The binder may be cement or a mixture of cement and a microscopic powder admixture. The admixture is one or more selected from reaction mixtures obtained by specified two processes and partially or completely neutralized substances obtained from such a reaction mixture through these two processes and also a specified third process.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: August 21, 2007
    Assignees: Takenaka Corporation, Takemoto Yushi Kabushiki Kaisha
    Inventors: Kenrou Mitsui, Masarou Kojima, Keishirou Okamoto, Toshio Yonezawa, Mitsuo Kinoshita, Masahiro Iida, Kazuhide Saitou, Shinji Tamaki
  • Ultra high-strength hydraulic cement compositions
    Publication number: 20050150428
    Abstract: An ultra high-strength hydraulic cement composition contains a binder, fine aggregates, coarse aggregates, an antifoaming agent, water and a specified admixture and has a unit amount of the binder in the range of 480-1800kg/m3. Water and the binder are contained at a ratio of 10-25% and the admixture is contained in the amount of 0.2-3.5 weight parts per 100 weight parts of the binder. The binder may be cement or a mixture of cement and a microscopic powder admixture. The admixture is one or more selected from reaction mixtures obtained by specified two processes and partially or completely neutralized substances obtained from such a reaction mixture through these two processes and also a specified third process.
    Type: Application
    Filed: October 27, 2004
    Publication date: July 14, 2005
    Inventors: Kenrou Mitsui, Masarou Kojima, Keishirou Okamoto, Toshio Yonezawa, Mitsuo Kinoshita, Masahiro Iida, Kazuhide Saitou, Shinji Tamaki
  • High-strength hydraulic cement compositions
    Publication number: 20050119375
    Abstract: A high-strength hydraulic cement composition contains cement, fine aggregates, coarse aggregates, water and a specified admixture and has a unit amount of water in the range of 120-185 kg/m3. Water and the cement are contained at a ratio of 20-40% and the admixture is contained in the amount of 0.1-3.0 weight parts per 100 weight parts of the cement. The admixture is one or more selected from reaction mixtures obtained by specified two processes and partially or completely neutralized substances obtained from such a reaction mixture through these two processes and also a specified third process.
    Type: Application
    Filed: October 27, 2004
    Publication date: June 2, 2005
    Inventors: Kenrou Mitsui, Masarou Kojima, Keishirou Okamoto, Toshio Yonezawa, Mitsuo Kinoshita, Masahiro Iida, Kazuhide Saitou, Shinji Tamaki