Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
88 words
A glass exhibiting a transition temperature no higher than 425° C. and excellent resistance to attack by water consisting essentially, expressed in terms of weight percent on the oxide basis, of about: ______________________________________
P.sub.2 O.sub.5
38-50 MoO.sub.3 0-10
Al.sub.2 O.sub.3
0-5 WO.sub.3 0-10
Na.sub.2 O 2-10 MoO.sub.3 + WO.sub.3
2-15
Li.sub.2 O 0.75-5 SnO.sub.2 0-10
K.sub.2 O 2-10 Cl 0-8 (analyzed)
Na.sub.2 O + Li.sub.2 O +
5-25 Sn.sub.2 O + MoO.sub.3 +
2-25
K.sub.2 O WO.sub.3 + Cl
ZnO 29-42
______________________________________ and being essentially free of PbO.
Claim 2
Dependent Claim
88 words
A glass exhibiting a transition temperature no higher than 425° C. and excellent resistance to attack by water consisting essentially, expressed in terms of weight percent on the oxide basis, of about: ______________________________________
P.sub.2 O.sub.5
38-50 MoO.sub.3 0-10
Al.sub.2 O.sub.3
0-5 WO.sub.3 0-10
Na.sub.2 O 2-10 MoO.sub.3 + WO.sub.3
2-15
Li.sub.2 O 0.75-5 SnO.sub.2 0-10
K.sub.2 O 2-10 Cl 0-8 (analyzed)
Na.sub.2 O + Li.sub.2 O +
5-25 Sn.sub.2 O + MoO.sub.3 +
2-25
K.sub.2 O WO.sub.3 + Cl
ZnO 29-42
______________________________________ and being essentially free of PbO.
Claim 3
Dependent Claim
15 words
A glass according to claim 1 containing at least 0.75% Al 1 O 3 .
Claim 4
Dependent Claim
59 words
A glass according to claim 1 consisting essentially of ______________________________________
P.sub.2 O.sub.5
40-50 MoO.sub.3 0-8
Al.sub.2 O.sub.3
0.75-3 WO.sub.3 0-10
Na.sub.2 O
2-7 MoO.sub.3 + WO.sub.3
2-10
Li.sub.2 O
1-4 SnO.sub.2 0-6
K.sub.2 O
4-8 Cl 0-7 (analyzed)
Na.sub.2 O +
9-15 Sn.sub.2 O + 4-20
Li.sub.2 O + K.sub.2 O
MoO.sub.3 + WO.sub.3 + Cl
ZnO 30-40.
______________________________________
Claim 5
Dependent Claim
22 words
A glass according to claim 1 which, in the form of frit, exhibits good flow at temperatures not exceeding about 475° C.
Claim 6
Dependent Claim
26 words
A glass according to claim 1 also containing up to 15% by weight of a mill addition to lower the linear coefficient of thermal expansion thereof.
Claim 7
Dependent Claim
47 words
A glass according to claim 5 wherein said mill addition is selected from the group consisting of β-quartz solid solution, β-spodumene solid solution, 64% iron/36% nickel alloy, β-eucryptite solid solution, fused quartz, 96% SiO 2 glass, and pyrophosphate crystalline materials having the crystalline structure of magnesium pyrophosphate.
Claim 8
Dependent Claim
44 words
A glass according to claim 6 wherein said pyrophosphate crystalline materials consist of magnesium pyrophosphate wherein a portion of the magnesium cations may optionally be replaced by at least one cation selected from the group consisting of aluminum, arsenic, cobalt, iron, zinc, and zirconium.