Patents by Inventor Michael A. Maxwell

Michael A. Maxwell 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).

  • High brightness orange-yellow-emitting electroluminescent phosphor and method of making
    Patent number: 6682664
    Abstract: An orange-yellow-emitting zinc sulfide-based electroluminescent phosphor is described wherein the phosphor has a brightness of greater than 10 foot-Lamberts. More particularly, the phosphor has a brightness of at least about 13 foot-Lamberts and an x color coordinate from about 0.51 to about 0.56 and a y color coordinate from about 0.42 to about 0.48. The zinc sulfide phosphor is activated with manganese, copper, chlorine, and a metal selected from gold and antimony.
    Type: Grant
    Filed: September 5, 2002
    Date of Patent: January 27, 2004
    Assignee: Osram Sylvania Inc.
    Inventors: Xianzhong Chen, Robert L. Stevens, Judy A. Belinski-Wolfe, Fuqiang Huang, Chen Wen Fan, Michael A. Maxwell