Patents by Inventor Shunichi Mishima

Shunichi Mishima 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).

  • Powdered quick-setting agent, quick-setting material, quick-setting material cured product, and spraying method
    Patent number: 11691919
    Abstract: A powdered quick-setting agent containing a calcium aluminate and a sodium silicate, preferably further containing at least one selected from the group consisting of an alkali metal sulfate, an alkaline earth metal sulfate, and an aluminum sulfate.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: July 4, 2023
    Assignee: Denka Company Limited
    Inventors: Takamitsu Murokawa, Masahiro Iwasaki, Shunichi Mishima, Katsuichi Miyaguchi, Akitoshi Araki, Yasuhiro Ishii, Kenji Hatta, Takanori Sakakibara
  • Quick-setting admixture and spraying method using it
    Patent number: 8950928
    Abstract: A slurry quick-setting admixture comprising an alkaline earth metal carbonate, a water-soluble acidic substance, calcium aluminate, an alkali metal sulfate, and water; and a quick-setting cement concrete comprising such a slurry quick-setting admixture and cement concrete. The slurry quick-setting admixture may further contain calcium sulfate, calcium hydroxide and/or aluminum hydroxide, a retarder, etc. The spraying method comprises mixing water and a powder quick-setting admixture comprising an alkaline earth metal carbonate, a water-soluble acidic substance, calcium aluminate and an alkali metal sulfate, to form a slurry quick-setting admixture, mixing this slurry quick-setting admixture with cement concrete to form a quick-setting cement concrete, and spraying this quick-setting cement concrete.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: February 10, 2015
    Assignee: Danki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yasuhiro Nakashima, Youhei Yamagishi, Shunichi Mishima, Isao Terashima
  • SET ACCELERATOR AND TECHNIQUE FOR SPRAYING WITH THE SAME
    Publication number: 20100072294
    Abstract: To provide a quick-setting admixture for spraying and a spraying method, which are effective to prevent solidification of a quick-setting admixture slurried in a quick-setting admixture-adding tool. A slurry quick-setting admixture comprising an alkaline earth metal carbonate, a water-soluble acidic substance, calcium aluminate, an alkali metal sulfate, and water; and a quick-setting cement concrete comprising such a slurry quick-setting admixture and cement concrete. The slurry quick-setting admixture may further contain calcium sulfate, calcium hydroxide and/or aluminum hydroxide, a retarder, etc. The spraying method comprises mixing water and a powder quick-setting admixture comprising an alkaline earth metal carbonate, a water-soluble acidic substance, calcium aluminate and an alkali metal sulfate, to form a slurry quick-setting admixture, mixing this slurry quick-setting admixture with cement concrete to form a quick-setting cement concrete, and spraying this quick-setting cement concrete.
    Type: Application
    Filed: November 7, 2007
    Publication date: March 25, 2010
    Applicant: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yasuhiro Nakashima, Youhei Yamagishi, Shunichi Mishima, Isao Terashima
  • Spraying material and spray technique employing the same
    Patent number: 7618490
    Abstract: To provide a spraying material having an excellent quick-setting property and excellent adherability, a small alkali amount and excellent initial strength development, and a spraying method using it. The spraying material comprises a liquid quick-setting admixture containing an aluminum source, a sulfur source and a fluorine source, one or more quick-setting aids selected from the group consisting of calcium aluminate, calcium sulfoaluminate, calcium aluminosilicate, an alkali metal-containing substance, calcium hydroxide and aluminum hydroxide, and a cement concrete, and the method is to spray this spraying material.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: November 17, 2009
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yasuhiro Nakashima, Shunichi Mishima, Masahiro Iwasaki, Isao Terashima, Atsumu Ishida, Takamitsu Murokawa, Tomohito Kobayashi
  • Spraying material and spray technique employing the same
    Publication number: 20070054059
    Abstract: To provide a spraying material having an excellent quick-setting property and excellent adherability, a small alkali amount and excellent initial strength development, and a spraying method using it. The spraying material comprises a liquid quick-setting admixture containing an aluminum source, a sulfur source and a fluorine source, one or more quick-setting aids selected from the group consisting of calcium aluminate, calcium sulfoaluminate, calcium aluminosilicate, an alkali metal-containing substance, calcium hydroxide and aluminum hydroxide, and a cement concrete, and the method is to spray this spraying material.
    Type: Application
    Filed: August 19, 2004
    Publication date: March 8, 2007
    Inventors: Yasuhiro Nakashima, Shunichi Mishima, Masahiro Iwasaki, Isao Terashima, Atsumu Ishida, Takamitsu Murokawa, Tomohito Kobayashi