Patents by Inventor Masatake Kiritani

Masatake Kiritani 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).

  • Fluoran compounds
    Patent number: 3996212
    Abstract: A pressure-sensitive copying paper comprising an adsorbent solid acid and a microencapsulated color former capable of forming a distinct color when reacted with the adsorbent acid coated on the same or a different surface of a support or supports, the microencapsulated color former being at least one fluoran compound represented by the formula; ##STR1## WHEREIN R.sub.1, R.sub.2, Z, m and ##STR2## are as defined hereinafter, is disclosed.
    Type: Grant
    Filed: January 9, 1975
    Date of Patent: December 7, 1976
    Assignees: Fuji Photo Film Co., Ltd., Hodogaya Chemical Co., Ltd.
    Inventors: Minoru Ozutsumi, Yoshihide Miyazawa, Katsuichi Motohashi, Masatake Kiritani, Akio Watanabe