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:
Oct. 22, 2024
Filed:
Oct. 08, 2019
Nippon Electric Glass Co., Ltd., Shiga, JP;
Tomonori Ichimaru, Shiga, JP;
Kiyotaka Kinoshita, Shiga, JP;
Ken Yuki, Shiga, JP;
Ryota Suzuki, Shiga, JP;
Yuta Nagano, Shiga, JP;
NIPPON ELECTRIC GLASS CO., LTD., Shiga, JP;
Abstract
A tempered glass has a surface and a thickness, wherein a stress profile of the tempered glass includes a first peak at the surface, at which the compressive stress becomes a maximum, a first bottom at which the stress, which gradually reduces from the first peak in the depth direction, becomes a local minimum, a second peak at which the compressive stress, which gradually increases from the first bottom in the depth direction, becomes a local minimum, and a second bottom at which the tensile stress, which gradually reduces from the second peak in the depth direction, becomes a minimum. The compressive stress at the first peak is 500 MPa or more, the compressive stress at the second peak Pis from 15 MPa to 250 MPa, and the depth of layer of the second peak is from 4% to 20% of the thickness.