Patents by Inventor Hiroji Kohno

Hiroji Kohno 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).

  • Adhesives useful for production of corrugated board
    Patent number: 4906679
    Abstract: A process for production of corrugated board using an aqueous adhesive which contains polyvinyl alcohol and clay, or polyvinyl alcohol, clay and water-soluble boron compound, the ratio of clay to polyvinyl alcohol being in the range of 200 to 600 parts by weight based on 100 parts by weight of polyvinyl alcohol, the ratio of water-soluble boron compound being not more than 15 parts by weight based on 100 parts by weight of polyvinyl alcohol, the solid content of the adhesive being 25 to 60% by weight characterized in that(a) a polyvinyl alcohol concentration in the solution excluding solid other than polyvinyl alcohol from adhesive being in the region bounded by the following formulas:Y.gtoreq.-0.0014 X+9.4 (i)Y.ltoreq.-0.0061 X+26.3 (ii)200.ltoreq.X.ltoreq.3500 (iii)wherein Y is defined by the following formula: ##EQU1## and X is degree of polymerization of polyvinyl alcohol, (b) the viscosity of the adhesive measured by a Brookfield viscometer being from 200 to 6000 centipoises at 85.degree. C.
    Type: Grant
    Filed: November 29, 1988
    Date of Patent: March 6, 1990
    Assignees: Kuraray Co., Ltd., Rengo Co., Ltd.
    Inventors: Masateru Tokuno, Kinichi Shirakawa, Takatoshi Koyakumaru, Takuji Okaya, Hiroji Kohno, Hiroyuki Onishi
  • Polymer composition and textile sizing agent made therefrom
    Patent number: 4835198
    Abstract: Disclosed herein is a highly compatible polymer composition which comprises (A) starch, (B) vinyl alcohol polymer having an alkyl group of 4 to 50 carbon atoms at the terminal, and/or (C) polyvinyl alcohol. Disclosed also herein is a textile sizing agent having outstanding weavability which comprises (A) starch, (B) vinyl alcohol polymer having an alkyl group of 4 to 50 carbo atoms at the terminal, (C) polyvinyl alcohol, and (D) oil for textile sizing.
    Type: Grant
    Filed: May 28, 1987
    Date of Patent: May 30, 1989
    Assignee: Kuraray Co., Ltd.
    Inventors: Hiroji Kohno, Kohji Moritani, Toshiaki Sato, Junnosuke Yamauchi, Takuji Okaya
  • Production process and adhesives for corrugated board
    Patent number: 4824696
    Abstract: A process for production of corrugated board using an aqueous adhesive which contains polyvinyl alcohol and clay, or polyvinyl alcohol, clay and water-soluble boron compound, the ratio of clay to polyvinyl alcohol being in the range of 200 to 600 parts by weight based on 100 parts by weight of polyvinyl alcohol, the ratio of water-soluble boron compound being not more than 15 parts by weight based on 100 parts by weight of polyvinyl alcohol, the solid content of the adhesive being 25 to 60% by weight characterized in that(a) a polyvinyl alcohol concentration in the solution excluding solid other than polyvinyl alcohol from adhesive being in the region bounded by the following formulas:Y.gtoreq.-0.0014 X+9.4 (i)Y.ltoreq.-0.0061 X+26.3 (II)200.ltoreq.X.ltoreq.
    Type: Grant
    Filed: October 30, 1985
    Date of Patent: April 25, 1989
    Assignees: Kuraray Co., Ldt., Rengo Co., Ltd.
    Inventors: Masateru Tokumo, Kinichi Shirakawa, Takatoshi Koyakumaru, Takuji Okaya, Hiroyuki Onishi, Hiroji Kohno
  • Water resistant composition and heat-sensitive recording sheet containing the same
    Patent number: 4708947
    Abstract: This invention relates to a water resistant composition which comprises (A) polyvinyl alcohol, (B) a chitosan of which aqueous 1% solution has a viscosity not greater than 70 centipoise at 20.degree. C. and (C) an aldehyde compound, as well as a heat-sensitive recording sheet which comprises said composition. The composition has excellent water resistant properties and the heat-sensitive recording sheet has improved color forming properties and excellent resistance to water and solvents.
    Type: Grant
    Filed: January 2, 1986
    Date of Patent: November 24, 1987
    Assignee: Kuraray Co., Ltd.
    Inventors: Hitoshi Maruyama, Isao Ono, Hiroji Kohno, Junnosuke Yamauchi, Takuji Okaya