Patents by Inventor Masatoshi Kemeshima

Masatoshi Kemeshima 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).

  • Nitride phosphor and method for preparation thereof, and light emitting device
    Publication number: 20040135504
    Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y−(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.
    Type: Application
    Filed: November 24, 2003
    Publication date: July 15, 2004
    Inventors: Hiroto Tamaki, Masatoshi Kemeshima, Suguru Takashima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai, Yoshinori Murazaki