Patents by Inventor Hideyasu Ohta

Hideyasu Ohta 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).

  • Method of undercoating treatment of polyester films for photographic light-sensitive materials
    Patent number: 4229523
    Abstract: A method of undercoating a polyester film of a light sensitive photographic material is disclosed in which one side of the film is pretreated such that the contact angle with water is below 58.degree.. Additionally, a layer of an aqueous dispersion containing no organic solvent is applied to said side of said film, said dispersion containing a copolymer containing up to 60% by weight of glycidyl methacrylate and 25-60% by weight of ethyl acrylate.
    Type: Grant
    Filed: March 30, 1979
    Date of Patent: October 21, 1980
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Hideyasu Ohta, Jun Shirasaki, Masaru Kanbe, Naoto Abe, Takahiro Uozumi, Masayoshi Mayama
  • Plastic support having improved adhesivness to material to be bonded thereto
    Patent number: 4197129
    Abstract: A hydrophobic plastic support which has a layer thereon comprising a copolymer, said copolymer consisting essentially of an acrylic monomer selected from alkyl esters of acrylic acid and alkyl esters of methacrylic acid, and an ethylenically unsaturated monomer having a group of the formula--COXROHwherein X stands for an oxygen atom or ##STR1## in which R' stands for a hydrogen atom, a substituted or unsubstituted alkyl group or a hydroxy group, and R stands for a substituted or unsubstituted alkylene group.
    Type: Grant
    Filed: June 17, 1976
    Date of Patent: April 8, 1980
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yasuji Muroi, Hideyasu Ohta, Masaru Kanbe, Jun Shirasaki
  • Light-sensitive silver halide photographic materials
    Patent number: 4148644
    Abstract: A light-sensitive silver halide photographic material having a cellulose ester film support coated on one side with a silver halide emulsion layer and on the other side with a non-light sensitive layer that is removable during an aqueous processing step. An optional portion of the non-light sensitive layer is coated with a magnetic recording layer formed from a dispersion containing at least 60% by weight of 2-ethoxyethanol. The resulting magnetic recording layer exhibits layer adhesion during subsequent development steps.
    Type: Grant
    Filed: November 3, 1977
    Date of Patent: April 10, 1979
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Hideyasu Ohta, Masayoshi Mayama
  • Process for subbing photographic hydrophobic films
    Patent number: 4128426
    Abstract: The present application is directed to a process for subbing a photographic hydrophobic film which involves subjecting at least one surface of the film to a hydrophylizing pretreatment step, coating the pretreated surface with an aqueous dispersion containing a polymer which has particular comonomers in a combined amount of more than 76%, then coating the coated surface with a liquid containing colloidal silica.
    Type: Grant
    Filed: February 25, 1977
    Date of Patent: December 5, 1978
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Hideyasu Ohta, Takahiro Uozumi, Masaru Kanbe, Naoto Abe, Jun Shirasaki, Masayoshi Mayama