Patents by Inventor Norimichi Kawashima

Norimichi Kawashima 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).

  • Abrasive tools
    Patent number: 4974373
    Abstract: An abrasive tool comprises a base and an abrasive powder bonded to the base in the form of a single-layer structure in which the particles do not substantially overlap or rest one upon another. For the bonding purpose the abrasive powder is either dispersed in a dilute solution of a binder resin and a solvent for subsequent application of the solution to the base or is spread over and fixed to a binder resin coat formed beforehand on the base.
    Type: Grant
    Filed: February 28, 1989
    Date of Patent: December 4, 1990
    Assignee: Tokyo Magnetic Printing Co., Ltd.
    Inventors: Norimichi Kawashima, Toshiro Hattori
  • Abrasives, abrasive tools, and grinding method
    Patent number: 4954140
    Abstract: A composite spherical-particle abrasive comprises spherical particles and abrasive particles, each spherical particle being coated with a plurality of abrasive particles. The composite abrasive particles are dispersed in a binder resin, and the dispersion is applied as an abrasive layer or coat to a backing to provide an abrasive tool. A grinding method uses such a composite spherical-particle abrasive tool.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: September 4, 1990
    Assignee: Tokyo Magnetic Printing Co., Ltd.
    Inventors: Norimichi Kawashima, Kazuya Orii
  • Lithographic plates and production process therefor
    Patent number: 4693958
    Abstract: Lithographic plate, and method for making same, comprises a plate substrate with a selectively ink-receptive coating in the image area of the plate, rendered ink receptive by heat conversion of an initially water-soluble polymer coating of specifically defined polymer classes.
    Type: Grant
    Filed: January 28, 1985
    Date of Patent: September 15, 1987
    Assignee: Lehigh University
    Inventors: Anthony M. Schwartz, Norimichi Kawashima, Albert C. Zettlemoyer