Patents by Inventor Hirohisa Otake

Hirohisa Otake 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).

  • Modified polyvinyl alcohol and process for producing the same
    Patent number: 10005867
    Abstract: The present invention provides modified PVA having unsaturated double bonds derived from a specific monomer in the main chain of the molecule. A modified polyvinyl alcohol containing bond units of the formula (1) having double bonds in its molecular main chain: wherein each of X1 and X2 is a C1-12 lower alkyl group, a hydrogen atom or a metal atom, g is an integer of from 0 to 3, h is an integer of from 0 to 12, Y1 is a hydrogen atom or —COOM, and M is a hydrogen atom, an alkyl group or a metal atom.
    Type: Grant
    Filed: August 29, 2005
    Date of Patent: June 26, 2018
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Satoshi Watanabe, Hirohisa Otake
  • Interlayer for laminated glass, and laminated glass
    Patent number: 9821535
    Abstract: There is provided an interlayer film for laminated glass which is capable of enhancing sound insulating properties in the laminated glass obtained in the case of being used for constituting the laminated glass, and laminated glass prepared using the interlayer film for laminated glass. An interlayer film for laminated glass according to the present invention includes a modified polyvinyl acetate and a plasticizer, and the modified polyvinyl acetate has a vinyl acetate structural unit and a fatty acid vinyl ester structural unit; the laminated glass according to the present invention includes a first laminated glass constituent member, a second laminated glass constituent member, and an interlayer film sandwiched between the first and second laminated glass constituent members, and in the laminated glass according to the present invention, the interlayer film is the interlayer film for laminated glass described above.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: November 21, 2017
    Assignees: SEKISUI CHEMICAL CO., LTD., DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Michio Shimamoto, Tatsuya Iwamoto, Ryousuke Komatsu, Shougo Yoshida, Nobuyuki Tanno, Takao Hashimoto, Hirohisa Otake
  • INTERLAYER FOR LAMINATED GLASS, AND LAMINATED GLASS
    Publication number: 20150258751
    Abstract: There is provided an interlayer film for laminated glass which is capable of enhancing sound insulating properties in the laminated glass obtained in the case of being used for constituting the laminated glass, and laminated glass prepared using the interlayer film for laminated glass. An interlayer film for laminated glass according to the present invention includes a modified polyvinyl acetate and a plasticizer, and the modified polyvinyl acetate has a vinyl acetate structural unit and a fatty acid vinyl ester structural unit; the laminated glass according to the present invention includes a first laminated glass constituent member, a second laminated glass constituent member, and an interlayer film sandwiched between the first and second laminated glass constituent members, and in the laminated glass according to the present invention, the interlayer film is the interlayer film for laminated glass described above.
    Type: Application
    Filed: October 31, 2013
    Publication date: September 17, 2015
    Inventors: Michio Shimamoto, Tatsuya Iwamoto, Ryousuke Komatsu, Shougo Yoshida, Nobuyuki Tanno, Takao Hashimoto, Hirohisa Otake
  • Modified Polyvinyl Alcohol and Process for Producing the Same
    Publication number: 20080214764
    Abstract: The present invention provides modified PVA having unsaturated double bonds derived from a specific monomer in the main chain of the molecule. A modified polyvinyl alcohol containing bond units of the formula (1) having double bonds in its molecular main chain: wherein each of X1 and X2 is a C1-12 lower alkyl group, a hydrogen atom or a metal atom, g is an integer of from 0 to 3, h is an integer of from 0 to 12, Y1 is a hydrogen atom or —COOM, and M is a hydrogen atom, an alkyl group or a metal atom.
    Type: Application
    Filed: August 29, 2005
    Publication date: September 4, 2008
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Satoshi Watanabe, Hirohisa Otake
  • Vinyl chloride/vinyl acetate copolymer, binder for a magnetic recording medium, and magnetic recording medium
    Patent number: 5994485
    Abstract: A vinyl chloride/vinyl acetate copolymer characterized in that it has a peak at a signal position of from 6.0 to 8.0 ppm in the .sup.1 H-NMR measurement.
    Type: Grant
    Filed: May 20, 1998
    Date of Patent: November 30, 1999
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hirohisa Otake, Yukihisa Hoshino
  • Binder resin for a heat transfer layer and heat transfer ink ribbon
    Patent number: 5268350
    Abstract: A binder resin for a heat transfer layer, which consists essentially of a polyvinyl acetacetal resin (I) having an acetacetalation degree of at least 87% by weight, the weight ratio of cis-vinyl acetacetal moiety/trans-vinyl acetacetal moiety in the acetacetal moiety of the resin (I) being from 1 to 4.
    Type: Grant
    Filed: March 10, 1993
    Date of Patent: December 7, 1993
    Assignees: Denki Kagaku Kogyo Kabushiki Kaisha, Sony Corporation
    Inventors: Hirohisa Otake, Satoshi Ozai, Akio Nishijima
  • Binder resin for a heat transfer layer and heat transfer ink ribbon
    Patent number: 5238996
    Abstract: A binder resin for a heat transfer layer, which consists essentially of a polyvinyl acetacetal resin (I) having an acetacetalation degree of at least 87% by weight, the weight ratio of cis-vinyl acetacetal moiety/trans-vinyl acetacetal moiety in the acetacetal moiety of the resin (I) being from 1 to 4.
    Type: Grant
    Filed: January 16, 1992
    Date of Patent: August 24, 1993
    Assignees: Denki Kagaku Kogyo Kabushiki Kaisha, Sony Corporation
    Inventors: Hirohisa Otake, Satoshi Ozai, Akio Nishijima