Patents by Inventor Shigenobu Kusakai

Shigenobu Kusakai 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).

  • Adhesives for dentin
    Patent number: 5252629
    Abstract: An adhesive showing a strong bonding effect on dentin characterized by comprising in combination a primer comprising a water-miscible monomer and a salt of copper, iron or cobalt, and a curing composition comprising a methacrylate monomer and a polymerization initiator containing a (thio)barbituric acid derivative as one component.
    Type: Grant
    Filed: April 17, 1992
    Date of Patent: October 12, 1993
    Assignee: GC Corporation
    Inventors: Yohji Imai, Shigenobu Kusakai
  • Dental glass ionomer cement compositions
    Patent number: 5063257
    Abstract: A dental glass ionomer cement composition comprises:(a) 5 to 100 parts by weight of a polymer of an .alpha.-.beta. unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000,(b) 5 to 100 parts by weight of a fluoroaluminosilicate glass powder having an average particle size of 0.02 to 10 .mu.m and a specific gravity of 2.4 to 4.0 and capable of reacting with said "polymer of an .alpha.-.beta. unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000",(c) 5 to 100 parts by weight of a polymerizable unsaturated organic compound having at least one CH.sub.2 .dbd.C(R1)--COO--group wherein R1=H or CH.sub.3,(d) 0.01 to 5 parts by weight of a polymerization catalyst,(e) 2 to 50 parts by weight of water,(f) 0.01 to 20 parts by weight of a surface active agent, and(g) 0.01 to 5 parts by weight of a reducing agent, and optionally h. 0 to 50 parts by weight of an inorganic filler having an average particle size of 0.02 to 10 .mu.
    Type: Grant
    Filed: December 11, 1989
    Date of Patent: November 5, 1991
    Assignee: G-C Dental Industrial Corp.
    Inventors: Shoji Akahane, Satoshi Tosaki, Yukiharu Kusayanagi, Shigenobu Kusakai, Kazuo Hirota, Kentaro Tomioka
  • Denture-base resin composition and method for using the same
    Patent number: 4398007
    Abstract: The denture-base resin composition of the present invention contains a liquid component obtained by incorporation of 0.5 to 20% by weight of a particular silane compound and 0.5 to 10% by weight of a unsaturated carboxylic acid into a methyl methacrylate monomer. Examples of the silane compound used in the present invention includes .gamma.-glycidoxypropyltrimethoxysilane, .gamma.-glycidoxypropyltriethoxysilane, .gamma.-methacryloxypropyltriethoxysilane, etc. The liquid component may be mixed with a methyl methacrylate polymer in a mixing ratio (by weight) of 1:3 to 3:1.
    Type: Grant
    Filed: October 22, 1980
    Date of Patent: August 9, 1983
    Assignee: G-C Dental Industrial Corp.
    Inventors: Takao Kubota, Shigenobu Kusakai