Patents by Inventor Yasukazu Nakada

Yasukazu Nakada 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).

  • Photochromic composition
    Patent number: 5266447
    Abstract: Disclosed is a photochromic composition comprising an organic photochromic compound and a specific tertiary amine compound which are dissolved or dispersed in a high-molecular compound. Also disclosed are a photochromic film composed of the above photochromic composition and a photochromic laminate having a photochromic layer composed of the above photochromic composition on a surface of a substrate.
    Type: Grant
    Filed: February 20, 1991
    Date of Patent: November 30, 1993
    Assignee: Lintec Corporation
    Inventors: Kazuhiro Takahashi, Yasukazu Nakada, Shigenobu Maruoka, Ichiro Tsuchida, Takanori Saito