Patents by Inventor Shin-ichiro Tada

Shin-ichiro Tada 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).

  • Grouting material
    Patent number: 7559987
    Abstract: A grouting material which comprises an ultrafine particle material having a maximum particle size of 15 micrometer or less, containing 3 to 40% by mass of cement clinker, 60 to 97% by mass of and blast-furnace slag, 0.5 to 3 parts by mass of gypsum in terms of SO3 based on 100 parts by mass of the total amount of cement clinker and blast-furnace slag, and further comprises (i) 0.7 to 7 parts by mass of calcium-aluminate-based rapid-hardening admixture, (ii) 0.01 to 0.13 parts by mass of setting retarder, and (iii) 0.2 to 1.0 parts by mass of high-performance water-reducing agent, based on 100 parts by mass of the ultrafine particle material can maintain high injectability for long, and rapidly starts to set after injected to thereby exhibit a good short-term strength.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: July 14, 2009
    Assignee: Nittetsu Cement Co., Ltd.
    Inventors: Takahiro Sato, Tomohiro Kanazawa, Tadashi Hayasaka, Ken Uoya, Akira Takami, Shin-ichiro Tada
  • GROUTING MATERIAL
    Publication number: 20090064902
    Abstract: A grouting material which comprises an ultrafine particle material having a maximum particle size of 15 micrometer or less, containing 3 to 40% by mass of cement clinker, 60 to 97% by mass of and blast-furnace slag, 0.5 to 3 parts by mass of gypsum in terms of SO3 based on 100 parts by mass of the total amount of cement clinker and blast-furnace slag, and further comprises (i) 0.7 to 7 parts by mass of calcium-aluminate-based rapid-hardening admixture, (ii) 0.01 to 0.13 parts by mass of setting retarder, and (iii) 0.2 to 1.0 parts by mass of high-performance water-reducing agent, based on 100 parts by mass of the ultrafine particle material can maintain high injectability for long, and rapidly starts to set after injected to thereby exhibit a good short-term strength.
    Type: Application
    Filed: February 8, 2007
    Publication date: March 12, 2009
    Applicant: NITTETSU CEMENT CO., LTD.
    Inventors: Takahiro Sato, Tomohiro Kanazawa, Tadashi Hayasaka, Ken Uoya, Akira Takami, Shin-ichiro Tada