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:
Apr. 27, 2004
Filed:
Aug. 22, 2002
Applicant:
Inventors:
Alexandre M. Mayolet, 28000 Chartres, FR;
Michael A. Pell, 77300 Fountainebleau, FR;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B 1/100 ; C30B 2/912 ;
U.S. Cl.
CPC ...
C30B 1/100 ; C30B 2/912 ;
Abstract
The present invention is directed to polycrystalline alkali metal or alkaline earth metal beads, in particular CaF beads, having a diameter greater than or equal to 100 &mgr;m, advantageously between 100 &mgr;m and 2 cm, and an apparent density greater than 60%, advantageously at least 90%, of the theoretical density of said fluoride. The invention is also directed to a process for the preparation of the foregoing alkali metal and alkaline earth fluoride beads, and for the preparation of single crystals of said fluorides using the foregoing polycrystalline beads.