Back to results
US 8,007,913 B2Granted
Laminated glass articles and methods of making thereof
AssigneeCorning Incorporated
InventorsFrank T. Coppola, Josef C. Lapp, Monica J. Mashewske
Life of this patent
Estimating the term…
Abstract
Disclosed are laminated glass articles and methods of making the same.
Claims18
A laminated glass sheet comprising a central core that comprises a core glass and an external skin that comprises a skin glass wherein:
- (a) the skin glass has a strain point greater than or equal to 700° C. and a melting temperature that is less than or equal to 1,665° C.;
- (b) when measured by a gradient boat technique, the skin glass has a liquidus viscosity that is in the range of 15,000-80,000 poise and the core glass has a liquidus viscosity that is greater than 100,000 poise so that the core glass is more stable with respect to devitrification during formation by a fusion overflow downdraw process than the skin glass;
- and
- (c) the laminated glass sheet is formed by a double fusion overflow downdraw process so that the central core has a rejoin surface and the external skin has a fire-polished surface.
1 more element
Dependencies are inferred from the claim text.