Patents by Inventor Masaaki Yamanaka

Masaaki Yamanaka 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).

  • Composite film and utilization thereof
    Patent number: 4418112
    Abstract: A composite film comprising a first layer comprising a polyolefin resin containing finely divided calcium carbonate dispersed therein and a surface layer comprising a polyolefin resin containing an acidic filler dispersed therein, which surface layer is bonded directly or indirectly to at least one surface of the first layer and has a thickness of at least 3 microns. A diazo copying paper is also disclosed which has a photosensitive diazo layer on the surface layer of the composite film.
    Type: Grant
    Filed: September 9, 1981
    Date of Patent: November 29, 1983
    Assignee: Oji Yuka Goseishi Kabushiki Kaisha
    Inventors: Takashi Toyoda, Yozo Ohba, Masaaki Yamanaka
  • Resin compositions of improved hue
    Patent number: 4341880
    Abstract: A resin composition of improved hue which comprises, in specified proportions, an olefin-based resin such as polypropylene and at least three specified antioxidants which are (1) 2,6-di-t-butyl paracresol, (2) tri(mono- and/or di-nonylphenyl)phosphite and/or distearyl pentaerythritol diphosphite, and (3) tris(3,5-di-t-butyl-4-hydroxybenzyl)isocyanurate and/or octadecyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)-propionate.
    Type: Grant
    Filed: February 20, 1981
    Date of Patent: July 27, 1982
    Assignee: Oji Yuka Goseishi Kabushiki Kaisha
    Inventors: Takashi Toyoda, Yozo Ohba, Masaaki Yamanaka
  • Synthetic paper comprising an olefin-based resin and an adduct
    Patent number: 4340639
    Abstract: A synthetic paper prepared by stretching a sheet of a composition comprising a thermoplastic resin mainly composed of an olefin-based resin and an adduct of melamine and isocyanuric acid or cyanuric acid to a size of 1.3 times or more the original size of the sheet at a temperature lower than the melting temperature of the olefin-based resin; such synthetic paper has good luster and sliding properties.
    Type: Grant
    Filed: July 25, 1980
    Date of Patent: July 20, 1982
    Assignee: Oji Yuka Goseishi Co., Ltd.
    Inventors: Takashi Toyoda, Yozo Ohba, Masaaki Yamanaka
  • Synthetic paper having good ink adhesion thereto
    Patent number: 4097645
    Abstract: A synthetic paper having good ink adhesion thereto which comprises:A. a synthetic paper substrate comprising a papery layer which is a stretched resin film which contains fine filler particles dispersed therein and has microvoids dispersed therein and surface ruptures thereon; andB. a layer for improving ink adhesion to the synthetic paper which is provided on at least one surface of the papery layer and comprises, as an essential constituent, an ethyleneimine adduct of a polyaminepolyamide.
    Type: Grant
    Filed: October 21, 1977
    Date of Patent: June 27, 1978
    Assignee: Oji Yuka Goseishi Kabushiki Kaisha
    Inventors: Takashi Toyoda, Yoshio Miyabe, Masaaki Yamanaka