Witness layers for glass articles

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 10206298
APP PUB NO 20170311466A1
SERIAL NO

15134973

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Glass articles having a base layer formed of glass and having a first compressive stress, an adjacent compression layer formed in the glass and having a second compressive stress, and a witness layer formed in the glass adjacent the compression layer and having a third compressive stress. The first, second and third compressive stresses all differing from one another. The witness layer also having a higher index of refraction than an index of refraction for the base or compression layers. Methods for manufacturing and methods of quality control that include the use of the witness layer are also disclosed.

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Patent Owner(s)

  • APPLE INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Luzzato, Victor Taipei, TW 20 311
Memering, Dale N Cupertino, US 97 1395
Qu, Dezheng Cupertino, US 5 42

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