Patents by Inventor Yoshinori Murazaki

Yoshinori Murazaki 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).

  • Long Decay phoaphors
    Patent number: 5376303
    Abstract: Long decay phosphors are disclosed that are comprised of rare-earth activated divalent, boron-substituted aluminates. In particular, the long decay phosphors are comprised ofMO.a(Al.sub.1-b B.sub.b).sub.2 O.sub.3 :cR,wherein0.5.ltoreq.a.ltoreq.10.0,0.0001.ltoreq.b.ltoreq.0.5 and0.0001.ltoreq.c.ltoreq.0.2,MO represents at least one divalent metal oxide selected from the group consisting of MgO, CaO, SrO and ZnO and R represents Eu and at least one additional rare earth element. Preferably, R represents Eu and at least one additional rare earth element selected from the group consisting of Pt, Nd, Dy and Tm.
    Type: Grant
    Filed: January 10, 1994
    Date of Patent: December 27, 1994
    Assignee: Nichia Chemical Industries, Ltd.
    Inventors: Martin R. Royce, Hiroto Tamaki, Yoshinori Murazaki