Glass manufacturing – Processes – Operating under inert or reducing conditions
Patent
1994-11-07
1996-07-30
Czaja, Donald E.
Glass manufacturing
Processes
Operating under inert or reducing conditions
65 323, 65 333, C03C 2300
Patent
active
055407455
ABSTRACT:
Cuprous halide- or a cuprous-cadmium halide-containing glass articles are produced which are essentially completely opaque to ultraviolet radiation and can De essentially completely opaque to radiation within the region of wavelengths of up to 550 nm, but are transparent to visible radiations having a wavelength longer than the radiation within the region of opacity. The method involves exposing the glass articles to a hydrogen gas-containing atmosphere at a temperature between about 375.degree.-500.degree. C. for a period of at least 18 hours to develop an integral reduced layer in at least one surface of the article having a depth effective to prevent the transmission of ultraviolet radiation and radiation having a wavelength up to 550 nm through the article.
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patent: 4240836 (1980-12-01), Borrelli et al.
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patent: 4979976 (1990-12-01), Havens et al.
patent: 5281562 (1994-01-01), Araujo et al.
patent: 5430573 (1995-07-01), Aravjo et al.
Havens Thomas G.
Kerko David J.
Morrell JoAnn
Corning Incorporated
Czaja Donald E.
Nwaneri Angela N.
Peterson Milton M.
Vincent Sean
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