Patents by Inventor Yasuji Ohgaki

Yasuji Ohgaki 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).

  • Curable composition for tendon for prestressed concrete and tendon
    Publication number: 20040044175
    Abstract: A curable composition applied to the surface of a tendon for prestressed concrete contains at least an epoxy resin and a moisture-curing type curing agent. In the curable composition, the tensioning-permitting time L at 90° C. is at least 20 hours, and the number of days M required to cure at normal temperature is at most 1095 days. The curable composition for tendons for prestressed concrete according to the present invention permits complete prevention of corrosion without conducting injection of a grout into a sheath and can be used even when the curable composition is heated to a high temperature by heat generated upon hardening of concrete.
    Type: Application
    Filed: August 21, 2003
    Publication date: March 4, 2004
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Toshiro Hirohata, Yasuji Ohgaki, Takashi Takagaki, Takashi Yoshioka, Kouji Kiyosu, Yoshihiko Touda
  • Curable composition for tendon for prestressed concrete and tendon
    Patent number: 6623558
    Abstract: A curable composition applied to the surface of a tendon for prestressed concrete contains at least an epoxy resin and a moisture-curing type curing agent. In the curable composition, the tensioning-permitting time L at 90° C. is at least 20 hours, and the number of days M required to cure at normal temperature is at most 1095 days. The curable composition for tendons for prestressed concrete according to the present invention permits complete prevention of corrosion without conducting injection of a grout into a sheath and can be used even when the curable composition is heated to a high temperature by heat generated upon hardening of concrete.
    Type: Grant
    Filed: June 5, 2001
    Date of Patent: September 23, 2003
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Toshiro Hirohata, Yasuji Ohgaki, Takashi Takagaki, Takashi Yoshioka, Kouji Kiyosu, Yoshihiko Touda
  • Curable composition for tendon for prestressed concrete and tendon
    Publication number: 20020011190
    Abstract: A curable composition applied to the surface of a tendon for prestressed concrete contains at least an epoxy resin and a moisture-curing type curing agent. In the curable composition, the tensioning-permitting time L at 90° C. is at least 20 hours, and the number of days M required to cure at normal temperature is at most 1095 days. The curable composition for tendons for prestressed concrete according to the present invention permits complete prevention of corrosion without conducting injection of a grout into a sheath and can be used even when the curable composition is heated to a high temperature by heat generated upon hardening of concrete.
    Type: Application
    Filed: June 5, 2001
    Publication date: January 31, 2002
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Toshiro Hirohata, Yasuji Ohgaki, Takashi Takagaki, Takashi Yoshioka, Kouji Kiyosu, Yoshihiko Touda