Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
166 words
A GLASS-CERAMIC ARTICLE CONSISTING ESSENTIALLY OF TETRASILICIC FLUORMICA CRYSTALS DISPERSED IN A GLASSY MATRIX, SAID CRYSTALS CONSTITUTING AT LEAST 50% BY VOLUME OF THE ARTICLE AND BEING ESSENTIALLY FREE OF AL+3 AND B+3 AS CRYSTAL CONSTITUENTS, AND SAID ARTICLE BEING FORMED BY THE CRYSTALLIZATION IN SITU OF A GLASS BODY CONSISTING ESSENTIALLY, IN WEIGHT PERCENT ON THE OXIDE BASIS AS CALCULATED FROM THE BATCH, OF ABOUT 55-65% SIO2, 12-20% MGO, 9-13% MGF2, 5-35% (R2O + RO) WHEREIN R2O RANGES FROM 5-25% AND CONSISTS OF AT LEAST ONE OXIDE SELECTED IN THE INDICATED PROPORTION FROM THE GROUP CONSISTING OF 0-20% K2O, 0-23% RB2O AND 0-25% CS2O, AND WHEREIN RO RANGES FROM 0-20% AND CONSISTS OF AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF SRO, BAO AND CDO, 0-10% TOTAL OF OXIDES SELECTED FROM THE GROUP CONSISTING OF AS2O5 AND SB2O5, AND 0-2% TOTAL OF GLASS COLORANTS SELECTED FROM THE GROUP CONSISTING OF K2CR2O7, KMNO4, NIO, CUO, CR2O3, FE2O3, FEO, V2O5, COO, ND2O3 AND ELEMENTAL AU.
Claim 2
Dependent Claim
166 words
A GLASS-CERAMIC ARTICLE CONSISTING ESSENTIALLY OF TETRASILICIC FLUORMICA CRYSTALS DISPERSED IN A GLASSY MATRIX, SAID CRYSTALS CONSTITUTING AT LEAST 50% BY VOLUME OF THE ARTICLE AND BEING ESSENTIALLY FREE OF AL+3 AND B+3 AS CRYSTAL CONSTITUENTS, AND SAID ARTICLE BEING FORMED BY THE CRYSTALLIZATION IN SITU OF A GLASS BODY CONSISTING ESSENTIALLY, IN WEIGHT PERCENT ON THE OXIDE BASIS AS CALCULATED FROM THE BATCH, OF ABOUT 55-65% SIO2, 12-20% MGO, 9-13% MGF2, 5-35% (R2O + RO) WHEREIN R2O RANGES FROM 5-25% AND CONSISTS OF AT LEAST ONE OXIDE SELECTED IN THE INDICATED PROPORTION FROM THE GROUP CONSISTING OF 0-20% K2O, 0-23% RB2O AND 0-25% CS2O, AND WHEREIN RO RANGES FROM 0-20% AND CONSISTS OF AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF SRO, BAO AND CDO, 0-10% TOTAL OF OXIDES SELECTED FROM THE GROUP CONSISTING OF AS2O5 AND SB2O5, AND 0-2% TOTAL OF GLASS COLORANTS SELECTED FROM THE GROUP CONSISTING OF K2CR2O7, KMNO4, NIO, CUO, CR2O3, FE2O3, FEO, V2O5, COO, ND2O3 AND ELEMENTAL AU.
Claim 3
Dependent Claim
78 words
A glass-ceramic article consisting essentially of tetrasilicic fluormica crystals dispersed in a glassy matrix, said crystals constituting at least 50% by volume of the article and being essentially free of Al 3 and B 3 as crystal constituents, and said article being formed by crystallization in situ of a glass body consisting essentially, in weight percent on the oxide basis as calculated from the batch, of about 55-65% SiO2, 12-20% MgO, 9-13% MgF2, 7-18% K2O and 0.5-8% As2O5.
Claim 4
Dependent Claim
78 words
A glass-ceramic article consisting essentially of tetrasilicic fluormica crystals dispersed in a glassy matrix, said crystals constituting at least 50% by volume of the article and being essentially free of Al 3 and B 3 as crystal constituents, and said article being formed by crystallization in situ of a glass body consisting essentially, in weight percent on the oxide basis as calculated from the batch, of about 55-65% SiO2, 12-20% MgO, 9-13% MgF2, 7-18% K2O and 0.5-8% As2O5.
Claim 5
Dependent Claim
38 words
A glass-ceramic article according to claim 2 which additionally contains from a trace to about 2% of glass colorants selected from the group consisting of K2Cr2O7, KMnO4, NiO, CuO, Cr2O3, Fe2O3, FeO, V2O5, CoO, Nd2O3 and elemental Au.