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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.:

US 10610459 B1

PDFFull Text
Date of Patent:
Apr. 07, 2020

Filed:

Feb. 04, 2016

Process for the preparation of a particulate dental filler composition

Applicant:

Dentsply Sirona Inc., York, PA (US);

Inventors:

Walz Uwe, Constance, DE;

Christoph Weber, Constance, DE;

Maier Maximillian, Constance, DE;

Assignee:

DENTSPLY SIRONA Inc., York, PA (US);

Attorney:

Dentsply Sirona Inc.

Primary Examiner:

Michael F Pepitone

Int. Cl.
CPC ...
A61K 6/00 (2020.01); C09C 1/30 (2006.01); A61K 6/083 (2006.01); A61K 6/02 (2006.01); C01B 13/20 (2006.01); A61K 6/08 (2006.01); C01B 33/20 (2006.01);
U.S. Cl.
CPC ...
A61K 6/0088 (2013.01); A61K 6/005 (2013.01); A61K 6/0008 (2013.01); A61K 6/0038 (2013.01); A61K 6/0073 (2013.01); A61K 6/024 (2013.01); A61K 6/025 (2013.01); A61K 6/0205 (2013.01); A61K 6/0235 (2013.01); A61K 6/0245 (2013.01); A61K 6/0255 (2013.01); A61K 6/08 (2013.01); A61K 6/083 (2013.01); C01B 13/20 (2013.01); C01B 33/20 (2013.01); C09C 1/30 (2013.01); C09C 1/3081 (2013.01); C01P 2006/12 (2013.01);
Abstract

Process for the preparation of a particulate dental filler composition, comprising the following steps: (a) introducing a mixture containing (a1) a silica precursor component, and (a2) a solution or dispersion of one or more compounds selected from compounds of aluminum, zinc, titanium, zirconium, tungsten, ytterbium, hafnium, bismuth, barium, strontium, silver, tantalum, lanthanum, tin, boron, and cerium, into a pulsed reactor; (b) converting the silica precursor component and the compounds into a particulate mixed oxide with a pulsed gas flow resulting from flameless combustion; (c) isolating the particulate mixed oxide from the pulsed reactor; (d) optionally subjecting the particulate mixed oxide to a heat treatment step; and (e) treating the optionally heat-treated particulate mixed oxide with a silane treatment agent for obtaining a particulate dental filler composition.

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