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:
Jul. 16, 2002
Filed:
Jul. 03, 2000
Applicant:
Inventors:
Jean-Jacques Braconnier, Lagord, FR;
Denis Huguenin, Asnieres-sur-Seine, FR;
Claude Ceintrey, Marly-le-Roi, FR;
Assignee:
Rhodia Chimie, Boulogne Billancourt Cedex, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 1/181 ;
U.S. Cl.
CPC ...
C09K 1/181 ;
Abstract
The present invention relates to the use of a compound based on a thulium-containing lanthanum phosphate as a phosphor in a plasma or X-ray system. This phosphate may furthermore contain gadolinium. The thulium content of the compound, expressed in at % with respect to the lanthanum, is between 0.1 and 10, more particularly between 0.5 and 5. The invention also covers a lanthanum phosphate which is characterized in that it contains thulium and in that it consists of particles having a mean size of between 1 and 20 &mgr;m with a dispersion index of less than 0.6.