Patents by Inventor Norimichi Koizumi

Norimichi Koizumi 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).

  • UV-ray sensitive composition and element for measuring UV-ray dose
    Patent number: 4829187
    Abstract: A UV-ray sensitive composition, comprising a photo activator forming a free radical by the irradiation of UV-rays, a discoloring agent which exhibits a color change in visible region of spectrum through the action of this free radical, and a UV-ray absorber.
    Type: Grant
    Filed: July 8, 1987
    Date of Patent: May 9, 1989
    Assignee: Shiseido Company Ltd.
    Inventors: Kenichi Tomita, Masaru Suetsugu, Minoru Fukuda, Takao Higashi, Norimichi Koizumi