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:
Dec. 02, 2025
Filed:
Mar. 05, 2021
Applicant:
Shofu Inc., Kyoto, JP;
Inventors:
Assignee:
SHOFU INC., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61C 13/00 (2006.01); A61C 13/083 (2006.01); B32B 18/00 (2006.01);
U.S. Cl.
CPC ...
A61C 13/0022 (2013.01); A61C 13/0004 (2013.01); A61C 13/083 (2013.01); B32B 18/00 (2013.01);
Abstract
A zirconia mill blank for dental cutting and machining which may impart reproducibility of color tone similar to a natural tooth and high strength to a zirconia perfect sintered body without a special sintering method such as HIP treatment. The zirconia mill blank for dental cutting and machining comprises at least two intermediate layers LA and LB which satisfy the Formula (1) and Formula (2) defined herein, and change directions of yttria concentration, alumina concentration and contrast ratio in a stacking direction are not changed by the at least two intermediate layers.