Patents Assigned to Sankin Kogyo K.K.
  • Dental restoration composition
    Patent number: 5306338
    Abstract: A two-part dental restoration composition composed of a powder and a liquid which are to be combined and evenly mixed prior to usage. The powder is composed of a fluoride containing and releasing glass having an average particulate size under one micron, an aromatic sulfinic acid or its salt and a tertiary amine. The liquid is composed of water-soluble methacryloxyalkyl phosphate, dimethacrylates, diluent monomers and a photoinitiator.
    Type: Grant
    Filed: November 3, 1992
    Date of Patent: April 26, 1994
    Assignee: Sankin Kogyo K.K.
    Inventor: Masayoshi Tsunekawa
  • Light-curable orthodontic bracket adhesive
    Patent number: 5112880
    Abstract: A light-curable orthodontic bracket adhesive composition is provided for bonding an orthodontic bracket to the surface of a human tooth. The composition contains a particulate filler material, an acrylate-based resin, and a photoinitiator composition effective to catalyze polymerization upon irradiation. A method of using the composition is also provided.
    Type: Grant
    Filed: March 9, 1990
    Date of Patent: May 12, 1992
    Assignees: Gingi-Pak, Sankin Kogyo K.K. Industry Ltd.
    Inventors: Masayoshi Tsunekawa, Raymond L. Ramirez