Patents by Inventor Keizi Kubo

Keizi Kubo 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).

  • Imaging light-sensitive material with etchable opaque polyamide underlayer and light-sensitive resist overlayer
    Patent number: 4307172
    Abstract: Disclosed is an imaging light-sensitive material which comprises a transparent substrate, [I] a polyamide layer containing an alcohol-soluble polyamide as the major component and having a thickness of from 2 to 11 microns and [II] a light-sensitive layer having a thickness of from 0.5 to 5 microns.
    Type: Grant
    Filed: April 30, 1980
    Date of Patent: December 22, 1981
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Tetsuo Ishihara, Keizi Kubo
  • Liquid composition for treating photosensitive laminates having alcohol-soluble polyamide layer
    Patent number: 4287297
    Abstract: Disclosed is a liquid composition for treating photosensitive laminates having an alcohol-soluble polyamide layer, which comprises 12 to 70 parts by weight of an aromatic neutral salt, 0.01 to 10 parts by weight of an alkali, 1 to 15 parts by weight of an alcohol and 84 to 100 parts by weight of water.
    Type: Grant
    Filed: March 3, 1980
    Date of Patent: September 1, 1981
    Assignee: Daicel Chemical Industries Ltd.
    Inventors: Tetsuo Ishihara, Keizi Kubo
  • Impact-resistant resin composition
    Patent number: 4144287
    Abstract: An impact-resistant resin composition comprises:100 parts by weight of a mixture of graft copolymers consisting of;50-90% by weight of a graft copolymer (A) obtained by polymerizing an aromatic monoalkenyl monomer and a vinyl cyan monomer in the presence of a diene type rubber component first under the bulk polymerization condition and subsequently continuing the polymerization under the suspension polymerization condition to substantially complete the polymerization, and having dispersed therein the rubber of an average particle size in the range of from 0.2 to 0.
    Type: Grant
    Filed: October 28, 1977
    Date of Patent: March 13, 1979
    Assignee: Daicel Ltd.
    Inventors: Teizo Kudo, Shoji Furukawa, Keizi Kubo