Patents by Inventor Hajime Nishiuma

Hajime Nishiuma 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 producing polarizing film
    Patent number: 7632430
    Abstract: The invention provides a continuous method for producing polarizing films that includes a step of monoaxially stretching a polyvinyl alcohol film having a width of at least 2 m in an aqueous boric acid solution, wherein the polyvinyl alcohol film is stretched on the condition that it satisfies the following formulae (1) and (2): A?5 (m)??(1) A/B?0.5 (min) (2) wherein A indicates the stretching distance (m); and B indicates the stretched film speed (m/min). The method gives wide polarizing films of wide and good polarization performance, and the polarizing films thus produced are useful as the material for polarizers that may be in large-size liquid-crystal displays.
    Type: Grant
    Filed: October 24, 2003
    Date of Patent: December 15, 2009
    Assignee: Kuraray Co., Ltd.
    Inventors: Takanori Isozaki, Tetsushi Hayashi, Hajime Nishiuma
  • Process for producing polarizing film
    Publication number: 20040089960
    Abstract: The invention provides a continuous method for producing polarizing films that includes a step of monoaxially stretching a polyvinyl alcohol film having a width of at least 2 m in an aqueous boric acid solution, wherein the polyvinyl alcohol film is stretched on the condition that it satisfies the following formulae (1) and (2):
    Type: Application
    Filed: October 24, 2003
    Publication date: May 13, 2004
    Applicant: Kuraray Co., Ltd.
    Inventors: Takanori Isozaki, Tetsushi Hayashi, Hajime Nishiuma