Patent Number: 6,255,240

Title: Strengthened, 1.7 index, glass lens

Abstract: The object of the present invention is a novel inorganic glass, which is capable of being strengthened by ionic exchange, and which has a refractive index of between 1.67 and 1.72; said novel glass strengthened on the surface thereof; its method of strengthening; and the corresponding ophthalmic lenses. Said novel glass has the following composition, expressed in wt. % of oxides:

Inventors: Comte; Marie J. M. (Fontenay aux Roses, FR), Mayolet; Alexandre M. (Chartres, FR)

Assignee: Corning S.A.

International Classification: C03C 21/00 (20060101); C03C 3/068 (20060101); C03C 3/062 (20060101); C03C 003/068 (); C03C 021/00 ()

Expiration Date: 07/03/2018