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:
May. 05, 1998
Filed:
Feb. 28, 1997
Applicant:
Inventor:
Jean-Jacques Braconnier, Lagord, FR;
Assignee:
Rhone-Poulenc Chimie, Courbevoie Cedex, FR;
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
2523 / ; 423263 ;
Abstract
Monodisperse particulates of lanthanum/cerium/terbium phosphates, the average particle size of which ranging from 1 to 15 -microns and preferably from 2 to 6 microns, and having a dispersion index of less than 0.5, preferably less than 0.4, are well suited as green luminophors displaying enhanced brilliance or precursors thereof, and are prepared via precipitation with phosphate ions at a substantially constant pH below 2, from LaCeTb solutions.