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:
Jun. 28, 2022
Filed:
May. 20, 2016
Applicant:
Dentsply Sirona Inc., York, PA (US);
Inventors:
Stefan Fecher, Johannesberg, DE;
Lothar Völkl, Goldbach, DE;
Assignee:
DENTSPLY SIRONA INC., York, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03B 32/00 (2006.01); C03C 21/00 (2006.01); C03C 4/00 (2006.01); C03C 3/097 (2006.01); A61K 6/804 (2020.01); A61K 6/818 (2020.01); A61K 6/822 (2020.01); A61K 6/824 (2020.01); A61K 6/833 (2020.01); A61K 6/853 (2020.01); C03B 25/00 (2006.01); C03C 10/00 (2006.01);
U.S. Cl.
CPC ...
C03C 21/002 (2013.01); A61K 6/804 (2020.01); A61K 6/818 (2020.01); A61K 6/822 (2020.01); A61K 6/824 (2020.01); A61K 6/833 (2020.01); A61K 6/853 (2020.01); C03B 25/00 (2013.01); C03C 3/097 (2013.01); C03C 4/0021 (2013.01); C03C 10/0027 (2013.01); C03C 2204/00 (2013.01);
Abstract
The invention relates to a method to derive a medical form body of lithium silicate glass ceramic. To increase its strength it is proposed that in the form body comprising lithium silicate glass or containing lithium silicate glass the lithium ions are replaced by alkali ions of greater diameter to generate a surface compressive stress. To this end the form body is covered with a melt containing an alkali metal for which an aliquoted quantity of salt containing the alkali metal is used.