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:
Feb. 05, 1991
Filed:
Jan. 26, 1989
Applicant:
Inventors:
Etienne Philippot, Saint Mathieu de Treviers, FR;
Jean-Claude Jumas, Castelnau le Nez, FR;
Bernard Capelle, Villejuif, FR;
Yves Toudic, Lannion, FR;
Jacques Detaint, Villemonble, FR;
Jacquie Schwartzel, Palaiseau, FR;
Aline Goiffon, Saint Clement la Riviiere, FR;
Maurice Maurin, Montpellier, FR;
Jean-Claude Doukhan, Villeneuve, FR;
Albert Zarka, Paris, FR;
Assignees:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B / ; C30B / ; C01B / ;
U.S. Cl.
CPC ...
1566 / ; 156621 ; 156D / ; 423311 ;
Abstract
The invention relates to a process for the preparation of berlinite crystals AlPO.sub.4, with a high Q factor, from seeds or crystalline flakes of AlPO.sub.4, by a hydrothermal method. It is characterized in that the crystallization solution is a sulfuric solution of AlPO.sub.4. The invention also relates to the berlinite monocrystals obtained by this process.