Fast strengthening glass lenses

Details Fast strengthening glass lenses Fast strengthening glass lenses

1992-11-27

1993-12-07

Group, Karl

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 67, 501 71, 501905, C03C 3091, C03C 408

Patent

active

052683354

ABSTRACT:
This invention is directed to the production of transparent glasses which can be chemically strengthened within a period of time not exceeding four hours to develop a surface compression layer having a sufficient depth to survive the Drop Ball Test after abrasion, the glasses consisting essentially, in weight percent, of

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patent: 4565791 (1986-01-01), Boudot et al.
patent: 4768859 (1988-09-01), Kasori et al.
patent: 4824806 (1989-04-01), Yokoi et al.
patent: 4925814 (1990-05-01), Fine

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