Patents by Inventor Tsutomu Kida

Tsutomu Kida 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).

  • Cement admixture and cement composition
    Patent number: 8663384
    Abstract: The invention provides a cement admixture that improves the ability of concrete to bring about high initial strength, works in favor of enhancing the effect on hexavalent chromium reductions, and is less likely to decrease in the effect on hexavalent chromium reductions even upon storage as well as a method for reducing hexavalent chromium. The invention is embodied as (1) A cement admixture, characterized by comprising an expanding material containing free lime, a hydraulic compound and calcium sulfate anhydrite, and a tin sulfate-containing substance; (2) The cement admixture according to (1), characterized in that the tin sulfate-containing substance is contained in an amount of 0.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: March 4, 2014
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takayuki Higuchi, Tsutomu Kida, Ryoetsu Yoshino
  • CEMENT ADMIXTURE, CEMENT COMPOSITION, AND METHOD FOR REDUCING HEXAVALENT CHROMIUM USING THE SAME
    Publication number: 20130247796
    Abstract: The invention provides a cement admixture that improves the ability of concrete to bring about high initial strength, works in favor of enhancing the effect on hexavalent chromium reductions, and is less likely to decrease in the effect on hexavalent chromium reductions even upon storage as well as a method for reducing hexavalent chromium. The invention is embodied as (1) A cement admixture, characterized by comprising an expanding material containing free lime, a hydraulic compound and calcium sulfate anhydrite, and a tin sulfate-containing substance; (2) The cement admixture according to (1), characterized in that the tin sulfate-containing substance is contained in an amount of 0.
    Type: Application
    Filed: October 24, 2011
    Publication date: September 26, 2013
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Takayuki Higuchi, Tsutomu Kida, Ryoetsu Yoshino