Patents by Inventor Mitsuoki Otani

Mitsuoki Otani 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 lamp with sharp emission peaks betwen 480 and 490 nm and between 620 and 640 nm
    Patent number: 4267485
    Abstract: A fluorescent lamp having excellent color rendering property and high luminous efficiency comprises a fluorescent layer coated on an inner surface of a discharge tube.The fluorescent layer mainly comprises a first fluorescent material having-emission peak in a range of wavelength of 480 to 490 nm which is an alkaline earth metal boron phosphate activated by a divalent europium compound having the formulam(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 .multidot.nB.sub.2 O.sub.3wherein the parameters x, y, p, m and n are in ranges of0.ltoreq.x.ltoreq.0.50.ltoreq.y.ltoreq.0.20.001.ltoreq.p.ltoreq.0.151.75.ltoreq.m.ltoreq.2.30 and0.05.ltoreq.n.ltoreq.0.23and a second fluorescent material having the emission peak in a range of wavelength of 620 to 649 nm and a band width (50%) of 120 to 160 nm.
    Type: Grant
    Filed: October 25, 1978
    Date of Patent: May 12, 1981
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Katsuo Murakami, Yoshinori Anzai, Mitsuoki Otani, Hiroshi Ito
  • 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