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. 02, 2021
Filed:
Apr. 21, 2016
Corning Incorporated, Corning, NY (US);
Izhar Zahoor Ahmed, Cupertino, CA (US);
Guangli Hu, Berkeley Heights, NJ (US);
Rostislav Vatchev Roussev, Painted Post, NY (US);
Po-Jen Shih, Vancouver, WA (US);
Irene Marjorie Slater, Lindley, NY (US);
Vijay Subramanian, Painted Post, NY (US);
Bin Zhang, Penfield, NY (US);
Sam Samer Zoubi, Horseheads, NY (US);
CORNING INCORPORATED, Corning, NY (US);
Abstract
A strengthened article (and methods for making it) is provided that includes a glass, glass-ceramic or ceramic, having a plurality of primary surfaces, side edges, and a thickness. The article also includes a compressive stress region extending from one of the primary surfaces to a first selected depth in the article; a central region extending from a boundary located at a depth of 200 μm from the primary surfaces and the edges to the centroid of the article; and an outer region extending between the primary surfaces and edges to the boundary. Further, the maximum principal stress within the outer region is no more than two times the maximum principal stress within the central region. The primary surfaces and side edges may define a plurality of corners, and the corners may be defined by a chamfer, a fillet, or a curved shape.