Patents by Inventor Akinori Oka

Akinori Oka 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).

  • Electrostatic recording material
    Patent number: 4840834
    Abstract: An electrostatic recording material which comprises a support coated in sequence with a conductive layer and a recording layer composed of a dielectric resin and a pigment, wherein at least a part of the pigment component in said recording layer is made of an aluminum hydroxide powder having an average particle size of 1-20 .mu.m is disclosed.
    Type: Grant
    Filed: March 19, 1987
    Date of Patent: June 20, 1989
    Assignee: Oji Paper Co., Ltd.
    Inventors: Yasuharu Onogi, Akinori Oka, Masakatsu Nagatomo, Takumi Kondo, Kouji Mizumoto
  • Press fixing type electrostatic recording material
    Patent number: 4460671
    Abstract: A press-fixing type electrostatic recording material having an excellent recording property comprises a substrate having a low surface resistivity of 10.sup.9 ohms or less and an electrostatic recording resinous layer which is formed on at least one surface of the substrate and which comprises a polyester resin and an anhydrous aluminum silicate uniformly mixed with the polyester resin.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: July 17, 1984
    Assignee: Oji Paper Co., Ltd.
    Inventors: Tokuro Yasuda, Akinori Oka