Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
A molybdenum seal glass composition which consists essentially of oxides in approximate percent by weight 55-68 SiO 2 , 15-18 Al 2 O 3 , 7-13 CaO, and 6-16 BaO, along with minor amounts of incidental impurities, residual fluxes, and refining agents, wherein the weight ratio of Al 2 O 3 to combined weight ratio of CaO and BaO is about in the range 0.6:1 to 1:1 so as to reside in the eutectic region of this aluminosilicate system, said glass composition having a liquidus temperature no greater than about 1250° C, a strain point of at least about 725° C, and an average coefficient of linear thermal expansion in the 0-300° C temperature range between about 42 × 10 -7 cm/cm/° C to about 48 × 10 -7 cm/cm/° C.
Claim 2
Dependent Claim
131 words
A molybdenum seal glass composition which consists essentially of oxides in approximate percent by weight 55-68 SiO 2 , 15-18 Al 2 O 3 , 7-13 CaO, and 6-16 BaO, along with minor amounts of incidental impurities, residual fluxes, and refining agents, wherein the weight ratio of Al 2 O 3 to combined weight ratio of CaO and BaO is about in the range 0.6:1 to 1:1 so as to reside in the eutectic region of this aluminosilicate system, said glass composition having a liquidus temperature no greater than about 1250° C, a strain point of at least about 725° C, and an average coefficient of linear thermal expansion in the 0-300° C temperature range between about 42 × 10 -7 cm/cm/° C to about 48 × 10 -7 cm/cm/° C.
Claim 3
Dependent Claim
18 words
A glass composition as in claim 1 which is essentially alkali metal ion free and lead oxide free.
Claim 4
Dependent Claim
19 words
A glass composition as in claim 1 wherein the mole % CaO content exceeds the mole % BaO content.
Claim 5
Dependent Claim
102 words
A molybdenum seal glass composition for a regenerative cycle halogen-containing incandescent lamp which consists essentially of oxides in approximate percent by weight 63 SiO 2 , 16 Al 2 O 3 , 9 CaO, and 12 BaO so as to reside in the eutectic region of this aluminosilicate system, along with minor amounts of incidental impurities, residual fluxes and refining agents, said glass composition having a liquidus temperature of approximately 1200° C, an average coefficient of linear thermal expansion in the 0°-300° C temperature range of about 43.5 × 10 -7 cm/cm/° C, and a strain point of at least 750° C.
Claim 6
Dependent Claim
102 words
A molybdenum seal glass composition for a regenerative cycle halogen-containing incandescent lamp which consists essentially of oxides in approximate percent by weight 63 SiO 2 , 16 Al 2 O 3 , 9 CaO, and 12 BaO so as to reside in the eutectic region of this aluminosilicate system, along with minor amounts of incidental impurities, residual fluxes and refining agents, said glass composition having a liquidus temperature of approximately 1200° C, an average coefficient of linear thermal expansion in the 0°-300° C temperature range of about 43.5 × 10 -7 cm/cm/° C, and a strain point of at least 750° C.