Patents by Inventor Sumiaki Ibuki

Sumiaki Ibuki 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).

  • Fluorescent material
    Patent number: 4174294
    Abstract: A fluorescent material is an alkaline earth metal boron phosphate activated by a divalent europium compound having the formula m(Sr.sub.1-x-y-p Ba.sub.x Ca.sub.y Eu.sub.p O).multidot.(1-n)P.sub.2 O.sub.5 nB.sub.2 O.sub.3 wherein parameters x, y, p, m and n are respectively in the ranges:0.ltoreq.x.ltoreq.0.50.ltoreq.y.ltoreq.0.20.001.ltoreq.p.ltoreq.0.151.75.ltoreq.m.ltoreq.2.300.05.ltoreq.n.ltoreq.0.
    Type: Grant
    Filed: October 25, 1978
    Date of Patent: November 13, 1979
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Katsuo Murakami, Mitsuoki Otani, Hiroshi Ito, Kenzo Awazu, Sumiaki Ibuki, Toshiyuki Takeda