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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 11833003 B1

PDFFull Text
Date of Patent:
Dec. 05, 2023

Filed:

Oct. 17, 2017

Method for the production of a blank, blank and a dental restoration

Applicant:

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

Inventors:

Markus Vollmann, Gelnhausen, DE;

Lothar Volkl, Goldbach, DE;

Stefan Fecher, Johannesberg, DE;

Carsten Wiesner, Rockenberg, DE;

Assignee:

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

Attorney:

DENTSPLY SIRONA INC.

Primary Examiner:

Alison L Hindenlang

Assistant Examiner:

Andrés E Behrens, Jr

Int. Cl.
CPC ...
A61C 13/00 (2006.01); A61C 13/083 (2006.01); A61C 13/09 (2006.01); A61C 5/70 (2017.01); A61C 13/08 (2006.01); A61K 6/818 (2020.01); A61K 6/822 (2020.01); A61K 6/824 (2020.01); A61K 6/833 (2020.01); A61C 5/77 (2017.01); B29C 43/14 (2006.01); B29C 43/00 (2006.01); B29C 43/20 (2006.01); B33Y 80/00 (2015.01); A61C 9/00 (2006.01);
U.S. Cl.
CPC ...
A61C 13/0022 (2013.01); A61C 5/70 (2017.02); A61C 5/77 (2017.02); A61C 13/0006 (2013.01); A61C 13/082 (2013.01); A61C 13/083 (2013.01); A61C 13/09 (2013.01); A61K 6/818 (2020.01); A61K 6/822 (2020.01); A61K 6/824 (2020.01); A61K 6/833 (2020.01); B29C 43/146 (2013.01); A61C 9/0046 (2013.01); B29C 43/203 (2013.01); B29C 2043/147 (2013.01); B33Y 80/00 (2014.12);
Abstract

The invention relates to a method for the production of a blank of a ceramic material, wherein a first ceramic material and then a second ceramic material of different compositions are filled into a mold and wherein the materials are pressed and after pressing are sintered. Thereby, a layer of the first ceramic material is filled into the mold, a first open cavity is formed in the layer, the second ceramic material is filled into the first open cavity and the materials are pressed together and are then heat-treated. Both the first ceramic material and the second ceramic material contain, or consists of, lithium silicate glass ceramic.

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