Patents by Inventor Katuhiko Higashino

Katuhiko Higashino 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).

  • Light-sensitive composition and light-sensitive lithographic printing plate containing o-quinonediazide compound, novolak resin, polymer and enclosure compound
    Patent number: 5723253
    Abstract: Disclosed is a light-sensitive composition containing an o-quinonediazide compound, a novolak resin and a polymer,characterized in that the polymer contains a constitutional unit selected from the group consisting of constitutional units represented by the formulae (I), (II) and (III): ##STR1## wherein R.sup.1 to R.sup.12 each represent a hydrogen atom, an alkyl group or a phenyl group,and a lithographic printing plate using the same.
    Type: Grant
    Filed: December 4, 1995
    Date of Patent: March 3, 1998
    Assignees: Konica Corporation, Mitsubishi Chemical Corporation
    Inventors: Katuhiko Higashino, Tomohisa Ohta, Shinichi Matsubara
  • Light-sensitive lithographic printing plate utilizing o-quinone diazide light-sensitive layer containing cyclic clathrate compound
    Patent number: 5635328
    Abstract: Disclosed are a light-sensitive lithographic printing plate which comprises a support subjected to graining treatment and anodization treatment and a layer of a positive light-sensitive composition containing a o-quinonediazide compound, an alkali-soluble resin and a clathrate compound provided on the support, and a method of processing the same which comprises subjecting the plate to image exposure and then development processing with a developing agent containing an alkali metal silicate.
    Type: Grant
    Filed: August 16, 1994
    Date of Patent: June 3, 1997
    Assignees: Konica Corporation, Mitsubishi Chemical Corporation
    Inventors: Katuhiko Higashino, Kaori Fukumuro, Shinichi Matsubara, Mitsuru Sasaki, Katsuko Ohta, Fumiyuki Matsuo