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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.:

US 12054419 B1

PDFFull Text
Date of Patent:
Aug. 06, 2024

Filed:

Jun. 01, 2021

Cover glass

Applicant:

Agc Inc., Tokyo, JP;

Inventors:

Kensuke Fujii, Tokyo, JP;

Shinji Kobune, Tokyo, JP;

Minoru Tamada, Tokyo, JP;

Hitoshi Mishiro, Tokyo, JP;

Assignee:

AGC Inc., Tokyo, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Erin Snelting

Int. Cl.
CPC ...
C03C 17/34 (2006.01); C03C 3/083 (2006.01); C03C 3/085 (2006.01); C03C 3/087 (2006.01); C03C 4/18 (2006.01); C03C 15/00 (2006.01); C03C 17/42 (2006.01); C03C 21/00 (2006.01); C09D 1/00 (2006.01); C09D 5/00 (2006.01); C09D 5/16 (2006.01); G02B 1/115 (2015.01); G02B 27/00 (2006.01); G02B 5/02 (2006.01);
U.S. Cl.
CPC ...
C03C 17/3417 (2013.01); C03C 3/083 (2013.01); C03C 3/085 (2013.01); C03C 3/087 (2013.01); C03C 4/18 (2013.01); C03C 15/00 (2013.01); C03C 17/42 (2013.01); C03C 21/002 (2013.01); C09D 1/00 (2013.01); C09D 5/006 (2013.01); C09D 5/1675 (2013.01); G02B 1/115 (2013.01); G02B 27/0006 (2013.01); C03C 2204/00 (2013.01); C03C 2217/218 (2013.01); C03C 2217/734 (2013.01); C03C 2218/154 (2013.01); C03C 2218/31 (2013.01); G02B 5/0268 (2013.01);
Abstract

A cover glass includes: a glass substrate having a convex and concave shape formed on at least one of surfaces thereof by an antiglare treatment; and an antireflection film disposed on the surface of the glass substrate, the surface having the convex and concave shape. In the cover glass, a difference Δa* in a* value between any two points within a surface of the cover glass on the side where the antireflection film is present and a difference Δb* in b* value between any two points within the surface of the cover glass on the side where the antireflection film is present satisfy the following expression: √{(Δa*)+(Δb*)}≤4.

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