Patents by Inventor Katsuhiko Yamazoe

Katsuhiko Yamazoe 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).

  • Organic rare-earth salt phosphor
    Patent number: 4572803
    Abstract: Rare-earth metal salts of organic carboxylic acids of this invention constitute themselves phosphors which exhibit unusually high luminescence efficiency, excel in chemical and physical stability and weatherability, show high affinity for other chemical substances and promise extensive usefulness in the field of high-performance luminescent products.
    Type: Grant
    Filed: June 30, 1982
    Date of Patent: February 25, 1986
    Assignee: Asahi Dow Limited
    Inventors: Katsuhiko Yamazoe, Akira Yoshino, Yoshiharu Kitahama, Isamu Iwami
  • Organic europlum salt phosphor
    Patent number: 4443380
    Abstract: Rare-earth metal salts of organic carboxylic acids of this invention constitute themselves phosphors which exhibit unusually high luminescence efficiency, excel in chemical and physical stability and weatherability, show high affinity for other chemical substances and promise extensive usefulness in the field of high-performance luminescent products.
    Type: Grant
    Filed: August 22, 1980
    Date of Patent: April 17, 1984
    Assignee: Asahi-Dow Limited
    Inventors: Katsuhiko Yamazoe, Akira Yoshino, Yoshiharu Kitahama, Isamu Iwami