The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 16, 1999
Filed:
Aug. 19, 1998
Applicant:
Inventors:
Chen-Wen Fan, Sayre, PA (US);
Dale E Benjamin, Athens, PA (US);
Franz Kummer, Munchen, DE;
Charles F Chenot, Towanda, PA (US);
Richard G Gingerich, Towanda, PA (US);
Assignee:
Osram Sylvania Inc., Danvers, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C23C / ; C23C / ; B05D / ; B05D / ;
U.S. Cl.
CPC ...
2523 / ; 2523 / ; 2523 / ; 2523 / ; 2523015 ; 2523 / ; 25230165 ; 2523 / ; 2523 / ; 428403 ; 428404 ; 427 70 ; 427213 ; 427215 ; 427255 ; 4272553 ;
Abstract
A method for forming a continuous, conformal non-particulate coating of boron oxide on individual phosphor particles is provided. The method involves reacting a boron-containing precursor with an oxidizing gas in a fluidized bed of phosphor particles. The boron oxide coated phosphor exhibits an increased quantum efficiency under ultraviolet (UV) and vacuum ultraviolet (VUV) excitation.