Witness layers for glass articles
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Feb 12, 2019
Grant Date -
Oct 26, 2017
app pub date -
Apr 21, 2016
filing date -
Apr 21, 2016
priority date (Note) -
In Force
status (Latency Note)
Importance
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US Family Size
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Non-US Coverage
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Abstract
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.
First Claim
Other Claims data not available
Family
| Country | kind | publication No. | Filing Date | Type | Sub-Type |
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International Classification(s)
- 2016 Application Filing Year
- C03C Class
- 1063 Applications Filed
- 726 Patents Issued To-Date
- 68.30 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 14 Citation Count
- C03C Class
- 97.27 % this patent is cited more than
- 6 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Aug 12, 2026 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Aug 12, 2030 |
