Brown-photochromic glasses

Details Brown-photochromic glasses Brown-photochromic glasses

1994-12-21

1996-01-09

Group, Karl

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 56, 501 66, C03C 406

Patent

active

054829020

ABSTRACT:
This invention is directed primarily to a composition for a photochromic glass which is essentially colorless in the undarkened state consisting essentially, expressed in terms of weight percent, of

REFERENCES:
patent: 4251278 (1981-02-01), Hares
patent: 4608349 (1986-08-01), Kerko et al.
patent: 4757034 (1988-07-01), Prassas
patent: 5023209 (1991-06-01), Grateau et al.
patent: 5244845 (1993-09-01), Kerko et al.
patent: 5256601 (1993-10-01), Kerko et al.
patent: 5300465 (1994-04-01), Gateau et al.

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