Invention Grant
- Patent Title: Glass sheet with a high luminous transmittance and with warm-toned to neutral colored edges
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Application No.: US16319054Application Date: 2017-07-18
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Publication No.: US11306020B2Publication Date: 2022-04-19
- Inventor: Thomas Lambricht , Audrey Dogimont
- Applicant: AGC GLASS EUROPE
- Applicant Address: BE Louvain-la-Neuve
- Assignee: AGC GLASS EUROPE
- Current Assignee: AGC GLASS EUROPE
- Current Assignee Address: BE Louvain-la-Neuve
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: EP16180330 20160720
- International Application: PCT/EP2017/068123 WO 20170718
- International Announcement: WO2018/015382 WO 20180125
- Main IPC: C03C3/095
- IPC: C03C3/095 ; C03C4/00

Abstract:
The invention relates to a glass sheet having a luminous transmission LTD4≥87% and having a composition free of antimony and arsenic, comprising total iron (expressed in the form of Fe2O3) from 0.002-0.04% and erbium (expressed in the form of Er2O3) from 0.003-0.1%. The glass sheet composition further having a redox ratio ≤32% and satisfying the formula 1.3*Fe2O3≤Er2O3−21.87*Cr2O3−53.12*Co≤2.6*Fe2O3. Such a glass sheet has a high luminous transmittance and has warm-toned to neutral colored edges and is particularly suitable due to its aesthetics as building glass or interior glass, as well as in furniture applications, as automotive glass, or as cover glass in electronic devices/displays.
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