Patents Assigned to Oji Kako Co., Ltd.
  • Patent number: 5372903
    Abstract: Respective phosphor layers (3R), (3G) and (3B) and a light absorption layer (2) are formed on the inner surface of a panel. An intermediate layer (11) is selectively formed on the surfaces of the respective phosphor layers by using a water soluble liquid having photosensitivity and containing water dispersion vinyl polymer emulsion and partial saponification polyvinyl acetate-system photosensitizer and then a metal-backing layer (12) is formed. A color purity of a phosphor screen can be increased and a brightness thereof can be improved.
    Type: Grant
    Filed: February 3, 1993
    Date of Patent: December 13, 1994
    Assignees: Sony Corporation, Oji Kako, Co., Ltd.
    Inventors: Norihiro Tateyama, Katsutoshi Ohno, Tsuneo Kusunoki, Hiroshi Itoh, Shuichi Nakazato, Naoki Isobe
  • Patent number: 5360860
    Abstract: A water-soluble resin emulsion comprising at least two incompatible water-soluble polymers, wherein said incompatible water-soluble polymers are stably compatibilized with each other by emulsion-polymerizing a monomer having a reactive unsaturated group in the presence of said incompatible water-soluble polymers as the protecting colloid. The emulsion is useful for a topcoating, prime-coating, material for a synthetic leather, photosensitive material for the preparation of a color filter, material for silver salt photography, and photosensitive material for screen printing.
    Type: Grant
    Filed: June 26, 1992
    Date of Patent: November 1, 1994
    Assignee: Oji Kako Co., Ltd.
    Inventors: Hiroshi Itoh, Naoki Isobe, Tadashi Asazuma
  • Patent number: 4891300
    Abstract: A photosensitive resin composition comprising a photosensitive saponified poly(vinyl acetate) derivative containing in the backbone thereof at least one of a first group of photosensitive units which are represented by the general formula (I) ##STR1## wherein represents a vinyl alcohol residue in the backbone of the saponified poly(vinyl acetate) derivative; Y represents a member selected from the group consisting of the following general formulae (II) and (III) ##STR2## m denotes an integer of 1-6; n denotes 0 or 1; R.sub.1 represents a member selected from a hydrogen atom, an unsubstituted alkyl and an unsubstituted aralkyl group, a hydroxyl group, a carbamoyl group, an ether bond and an unsaturated bond; R.sub.2 represents a member selected from a hydrogen atom and a lower alkyl group; and X.sup.
    Type: Grant
    Filed: September 23, 1987
    Date of Patent: January 2, 1990
    Assignees: Director-General of Agency of Industrial Science & Technology Ministry of International Trade and Industry, Oji Kako Co., Ltd.
    Inventors: Kunihiro Ichimura, Hiroshi Itoh, Shuuichi Nakazato, Hideaki Takazawa