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:
Mar. 05, 2019
Filed:
Oct. 02, 2014
3m Innovative Properties Company, St. Paul, MN (US);
Jacqueline C. Rolf, River Falls, WI (US);
Richard P. Rusin, Woodbury, MN (US);
Colin F. Norman, Hudson, WI (US);
Melinda B. Gustafson, Lake Elmo, MN (US);
James D. Hamer, White Bear Lake, MN (US);
Charles G. Carter, Woodbury, MN (US);
Roxanne A. Boehmer, Inver Grove Heights, MN (US);
Brian N. Holmes, St. Paul, MN (US);
Tara Waldrop, Los Alamos, NM (US);
Brady P. Haislet, Maple Plain, MN (US);
3M Innovative Properties Company, St, MN (US);
Abstract
Disclosed herein a dental mill blank and a method of forming the dental mill blank. The dental mill blank includes a first layer of a first hard restorative material having a first translucency and a first shade, a second layer of a second hard restorative material having a second translucency and a second shade, where at least one of the following is true (1) the first translucency is different from the second translucency, (2) the first shade is different from the second shade. The first layer and the second layer form a first interface having a first curve across a first plane of symmetry of the dental mill blank, where the first curve has a different from zero curvature; and a first straight line along the entire length of a second plane of the dental mill blank, the second plane being orthogonal to the first plane of symmetry.