Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
164 words
A porcelain-fused-to-metal dental restoration comprising porcelain fused to a casting of a cobalt-chromium alloy consisting essentially of: ______________________________________
Element Weight Percent
______________________________________
Cobalt 50-70
Chromium 25-35
Molybdenum 2-10
Manganese 0-2
Carbon 0-0.1
______________________________________ and (i) from about 3.5 to about 6% silicon, or (ii) from about 2 to about 6% silicon and from about 0.1 to 1.5% boron with the proviso that the combined amount of silicon and boron is greater than or equal to 3%, or (iii) from about 1 to about 6% aluminum, or (iv) from about 1 to about 6% silicon and from about 1 to about 6% aluminum with the proviso that the combined amount of silicon and aluminum is less than about 8%, or (v) from about 1 to about 6% silicon, from about 0.1 to about 1.5% boron and from about 1 to about 6% aluminum with the proviso that the combined amount of silicon and aluminum is less than about 8%, the named alloy constituents totalling 100%.
Claim 2
Dependent Claim
164 words
A porcelain-fused-to-metal dental restoration comprising porcelain fused to a casting of a cobalt-chromium alloy consisting essentially of: ______________________________________
Element Weight Percent
______________________________________
Cobalt 50-70
Chromium 25-35
Molybdenum 2-10
Manganese 0-2
Carbon 0-0.1
______________________________________ and (i) from about 3.5 to about 6% silicon, or (ii) from about 2 to about 6% silicon and from about 0.1 to 1.5% boron with the proviso that the combined amount of silicon and boron is greater than or equal to 3%, or (iii) from about 1 to about 6% aluminum, or (iv) from about 1 to about 6% silicon and from about 1 to about 6% aluminum with the proviso that the combined amount of silicon and aluminum is less than about 8%, or (v) from about 1 to about 6% silicon, from about 0.1 to about 1.5% boron and from about 1 to about 6% aluminum with the proviso that the combined amount of silicon and aluminum is less than about 8%, the named alloy constituents totalling 100%.
Claim 3
Dependent Claim
29 words
A porcelain-fused-to metal dental restoration as defined in claim 1 additionally containing yttrium and/or zirconium, either alone or in combination, in an amount up to about 0.25 weight percent.
Claim 4
Dependent Claim
19 words
A porcelain-fused-to metal dental restoration as defined in claim 1 additionally containing up to about 20 weight percent tin.
Claim 5
Dependent Claim
19 words
A porcelain-fused-to metal dental restoration as defined in claim 1 additionally containing up to about 6 weight precent iron.
Claim 6
Dependent Claim
158 words
A porcelain-fused-to-metal dental restoration comprising porcelain fused to a casting of a cobalt-chromium alloy consisting essentially of: ______________________________________
Element Weight Percent
______________________________________
Cobalt 55-65
Chromium 25-35
Molybdenum 2-6
Manganese 0.5-2
Carbon 0-0.1
______________________________________ (i) from about 3.5 to about 4.5% silicon, or (ii) from about 2 to about 4.5% silicon and from about 0.5 to about 1% boron with the proviso that the combined amount of silicon and boron is at least 3.5%, or (iii) from about 2 to about 4.5% aluminum, or (iv) from about 2 to 4.5% silicon and from about 2 to 4.5% aluminum with the proviso that the combined amount of silicon and aluminum is less than 8%, or (v) from about 2 to about 4.5% silicon, from about 0.25 to about 1% boron and from about 2 to about 4.5% aluminum with the proviso that the combined amount of silicon and aluminum is less than about 8%, the named alloy constituents totalling 100%.
Claim 7
Dependent Claim
158 words
A porcelain-fused-to-metal dental restoration comprising porcelain fused to a casting of a cobalt-chromium alloy consisting essentially of: ______________________________________
Element Weight Percent
______________________________________
Cobalt 55-65
Chromium 25-35
Molybdenum 2-6
Manganese 0.5-2
Carbon 0-0.1
______________________________________ (i) from about 3.5 to about 4.5% silicon, or (ii) from about 2 to about 4.5% silicon and from about 0.5 to about 1% boron with the proviso that the combined amount of silicon and boron is at least 3.5%, or (iii) from about 2 to about 4.5% aluminum, or (iv) from about 2 to 4.5% silicon and from about 2 to 4.5% aluminum with the proviso that the combined amount of silicon and aluminum is less than 8%, or (v) from about 2 to about 4.5% silicon, from about 0.25 to about 1% boron and from about 2 to about 4.5% aluminum with the proviso that the combined amount of silicon and aluminum is less than about 8%, the named alloy constituents totalling 100%.