Patents by Inventor Yuichi Kimizuka

Yuichi Kimizuka 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).

  • Green light emitting phosphor
    Patent number: 5104573
    Abstract: A green light emitting phosphor comprising tetravalent elements added to a green light emitting phosphor, Y.sub.3 (Al,Ga).sub.5 O.sub.12 :Tb, wherein the green light emitting phosphor can prevent a so-called electron beam burning even when excited by electron beams of high energy. The green light emitting phosphor is, particularly suitable to be applied to a projector tube or a high-brightness phosphor display tube.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: April 14, 1992
    Assignee: Sony Corporation
    Inventors: Katsutoshi Ono, Tomohiko Abe, Tsuneo Kusunoki, Yuichi Kimizuka
  • Method of preparing fluorescent material of small particle size
    Patent number: 4801398
    Abstract: A fluorescent material of small size is prepared by synthesizing a fluorescent material of predetermined molecular structure in a single phase, pulverizing the fluorescent material thus produced and then heat treating the pulverized material under conditions sufficient to recover the luminance characteristics which were lost as a result of pulverizing.
    Type: Grant
    Filed: June 1, 1988
    Date of Patent: January 31, 1989
    Assignee: Sony Corporation
    Inventors: Katsutoshi Ohno, Abe, Yuichi Kimizuka