Patents by Inventor Toshiyuki Edazawa

Toshiyuki Edazawa 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).

  • Process for preparing polyvinyl alcohol film and polarizing film using the same
    Patent number: 7517478
    Abstract: A process for preparing an optically homogeneous polyvinyl alcohol film having an excellent appearance without forming wrinkles and scratches and causing blocking of the film, the process comprising the steps of forming a polyvinyl alcohol film from a solution of a polyvinyl alcohol resin, and rolling up the film around a cylindrical core, wherein the surface hardness of the rolled up film is set to a Shore A hardness of 60 to 95 measured according to JIS K 6301 under conditions of 25° C. and 55% RH.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: April 14, 2009
    Assignee: The Nippon Synthetic Chemical Industry Co. Ltd.
    Inventors: Kenji Hasegawa, Toshiyuki Edazawa
  • Roll of polyvinyl alcohol film and polarizing film prepared therefrom
    Patent number: 7204443
    Abstract: A polyvinyl alcohol film roll including a cylindrical core tube made of a metallic material and having a surface roughness of at most 100 S and a polyvinyl alcohol film wound up around the cylindrical core tube, the film roll being obtained by forming the film from a solution of a polyvinyl alcohol resin and winding up the film around the core tube, and the film roll being capable of providing an optically homogeneous polyvinyl alcohol film having an excellent appearance.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: April 17, 2007
    Assignee: The Nippon Synthetic Chemical Industry Co., Ltd.
    Inventors: Hidefumi Niki, Toshiyuki Edazawa
  • Process for preparing polyvinyl alcohol film and polarizing film using the same
    Publication number: 20040113307
    Abstract: A process for preparing an optically homogeneous polyvinyl alcohol film having an excellent appearance without forming wrinkles and scratches and causing blocking of the film, the process comprising the steps of forming a polyvinyl alcohol film from a solution of a polyvinyl alcohol resin, and rolling up the film around a cylindrical core, wherein the surface hardness of the rolled up film is set to a Shore A hardness of 60 to 95 measured according to JIS K 6301 under conditions of 25° C. and 55% RH.
    Type: Application
    Filed: December 9, 2003
    Publication date: June 17, 2004
    Applicant: The Nippon Synthetic Chemical Industry Co., Ltd.
    Inventors: Kenji Hasegawa, Toshiyuki Edazawa
  • Roll of polyvinyl alcohol film and polarizing film prepared therefrom
    Publication number: 20040114240
    Abstract: A polyvinyl alcohol film roll comprising a cylindrical core tube made of a metallic material and having a surface roughness of at most 100 S and a polyvinyl alcohol film wound up around the cylindrical core tube, the film roll being obtained by forming the film from a solution of a polyvinyl alcohol resin and winding up the film around the core tube, and the film roll being capable of providing an optically homogeneous polyvinyl alcohol film having an excellent appearance.
    Type: Application
    Filed: December 9, 2003
    Publication date: June 17, 2004
    Applicant: The Nippon Synthetic Chemical Industry Co., Ltd.
    Inventors: Hidefumi Niki, Toshiyuki Edazawa