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:
Jan. 19, 1993
Filed:
Nov. 22, 1991
Friedrich Wahl, Mannheim, DE;
Andrea Maurer-Rothmann, Weinheim, DE;
Karl Merkenich, Fuerth/Fahrenbach, DE;
BK Ladenburg GmbH, Ladenburg, DE;
Abstract
A process for the production of an aqueous suspension of hydroxylapatite from calcium hydroxide or calcium oxide, and phosphoric acid in which, while stirring, phosphoric acid is slowly added to an aqueous solution or suspension of the calcium compound up to a calcium/phosphorus mole ratio of 10:6, wherein the course of the reaction and the achievement of the end point of the reaction is determined by the conductivity of the solution or suspension. The process results in the production of essentially pure hydroxylapatite, which is useful as, for example, a teeth cleaning agent, a bone-replacement, or as a carrier material for pharmaceutical compositions.