Patents by Inventor Norimichi Aoki

Norimichi Aoki 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).

  • Alumina-based ceramics materials, abrasive materials and method for the manufacture of the same
    Patent number: 5215551
    Abstract: An .alpha.-alumina-based ceramics material comprising crystals of a particle diameter of no greater than 0.2 .mu.m on an average or a particle diameter of substantially no greater than 0.2 .mu.m, and having a density of no lower than 95% of the theoretical density and a hardness of no lower than 2,000 kg/mm.sup.2, and a method for the production thereof.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: June 1, 1993
    Assignee: Showa Denko K.K.
    Inventors: Tetsuo Hatanaka, Tadashi Hiraiwa, Minoru Matsukura, Norimichi Aoki, Shoichi Imai
  • Abrader for mirror polishing of glass
    Patent number: 4106915
    Abstract: An abrader for use in mirror polishing of glass comprises a porous cured unsaturated polyester resin and zirconium oxide or cerium oxide or red iron oxide. Desired mirror polishing of glass is effected by grinding the glass surface with this abrader under continued supply of water or a cutting oil to the interface of grinding.
    Type: Grant
    Filed: November 8, 1976
    Date of Patent: August 15, 1978
    Assignee: Showa Denko K. K.
    Inventors: Fumio Kagawa, Norimichi Aoki