Gold free alloys for firing on ceramic compositions

Claim 2

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, 0.2 to 1 weight % boron, and the balance consisting essentially of cobalt.

Claim 3

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, also containing boron, the boron being present in an amount of up to 1 weight % and containing molybdenum, tungsten, or a mixture of molybdenum and tungsten, said molybdenum, tungsten, or mixture thereof being present in an amount of up to 20 weight %, and the balance consisting essentially of cobalt.

Claim 4

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, also containing boron, the boron being present in an amount of up to 1 weight % and containing molybdenum, tungsten, or a mixture of molybdenum and tungsten, said molybdenum, tungsten, or mixture thereof being present in an amount of up to 20 weight %, and the balance consisting essentially of cobalt.

Claim 5

A gold free alloy according to claim 2 containing an element which is scandium, yttrium, lanthanum, another rare earth or mixture of such elements, said element or mixture of elements being present in an amount of up to 8 weight %.

Claim 6

A gold free alloy according to claim 3 containing aluminum, silicon, tin, indium, gallium or mixture thereof, said aluminum, silicon, tin, indium, gallium or mixture thereof being present in an amount of up to 5 weight %.

Claim 7

A gold free alloy according to claim 2 containing aluminum, silicon, tin, indium, gallium or mixture thereof, said aluminum, silicon, tin, indium, gallium or mixture thereof being present in an amount of up to 5 weight %.

Claim 8

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 5-40 weight % palladium, 3-25 weight % chromium, also containing boron, the boron being present in an amount of up to 1 weight % and containing molybdenum, tungsten, or a mixture of molybdenum and tungsten, said molybdenum, tungsten, or mixture thereof being present in an amount of up to 20 weight %, and the balance consisting essentially of cobalt.

Claim 9

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 5-40 weight % palladium, 3-25 weight % chromium, also containing boron, the boron being present in an amount of up to 1 weight % and containing molybdenum, tungsten, or a mixture of molybdenum and tungsten, said molybdenum, tungsten, or mixture thereof being present in an amount of up to 20 weight %, and the balance consisting essentially of cobalt.

Claim 10

A gold free alloy according to claim 6 containing an element which is scandium, yttrium, lanthanum, another rare earth or mixture of such elements, said element or mixture of elements being present in an amount of up to 8 weight %.

Claim 11

A gold free alloy according to claim 7 containing aluminum, silicon, tin, indium, gallium or mixture thereof, said aluminum, silicon, tin, indium, gallium or mixture thereof being present in an amount of up to 5 weight %.

Claim 12

A gold free alloy according to claim 6 containing aluminum, silicon, tin, indium, gallium or mixture thereof, said aluminum, silicon, tin, indium, gallium or mixture thereof being present in an amount of up to 5 weight %.

Claim 13

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, also containing boron, the boron being present in an amount of up to 1 weight % and containing an element which is scandium, yttrium, lanthanum, another rare earth or mixture of such elements, said element or mixture of elements being present in an amount of up to 8 weight %, and the balance consisting essentially of cobalt.

Claim 14

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, also containing boron, the boron being present in an amount of up to 1 weight % and containing an element which is scandium, yttrium, lanthanum, another rare earth or mixture of such elements, said element or mixture of elements being present in an amount of up to 8 weight %, and the balance consisting essentially of cobalt.

Claim 15

A gold free alloy according to claim 10 containing aluminum, silicon, tin, indium, gallium or mixture thereof, said aluminum, silicon, tin, indium, gallium or mixture thereof being present in an amount of up to 5 weight %.

Claim 16

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 5-40 weight % palladium, 3-25 weight % chromium, also containing boron, the boron being present in an amount of up to 1 weight % and containing an element which is scandium, yttrium, lanthanum, another rare earth or mixture of such elements, said element or mixture of elements being present in an amount of up to 8 weight %, and the balance consisting essentially of cobalt.

Claim 17

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 5-40 weight % palladium, 3-25 weight % chromium, also containing boron, the boron being present in an amount of up to 1 weight % and containing an element which is scandium, yttrium, lanthanum, another rare earth or mixture of such elements, said element or mixture of elements being present in an amount of up to 8 weight %, and the balance consisting essentially of cobalt.

Claim 18

A gold free alloy according to claim 12 containing aluminum, silicon, tin, indium, gallium or mixture thereof, said aluminum, silicon, tin, indium, gallium or mixture thereof being present in an amount of up to 5 weight %.

Claim 19

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, containing aluminum, silicon, tin, indium, gallium, or mixture thereof, said aluminum, silicon, tin, indium, gallium, or mixture thereof being present in an amount of up to 5 weight %, and the balance consisting essentially of cobalt.

Claim 20

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, containing aluminum, silicon, tin, indium, gallium, or mixture thereof, said aluminum, silicon, tin, indium, gallium, or mixture thereof being present in an amount of up to 5 weight %, and the balance consisting essentially of cobalt.

Claim 21

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 5-40 weight % palladium, 3-25 weight % chromium, containing aluminum, silicon, tin, indium, gallium, or mixture thereof, said aluminum, silicon, tin, indium, gallium, or mixture thereof being present in an amount of up to 5 weight %, and the balance consisting essentially of cobalt.

Claim 22

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 5-40 weight % palladium, 3-25 weight % chromium, containing aluminum, silicon, tin, indium, gallium, or mixture thereof, said aluminum, silicon, tin, indium, gallium, or mixture thereof being present in an amount of up to 5 weight %, and the balance consisting essentially of cobalt.

Claim 23

A dental ceramic composition having fired thereon as a facing of gold free alloy selected from the group consisting of (1) 1-70 weight % palladium, 0.1-35 weight % chromium and the balance consisting essentially of cobalt, (2) 1-70 weight % palladium, 0.1-35 weight % chromium, boron, the boron being present in an amount of up to 1 weight % and the balance consisting essentially of cobalt, (3) 1-70 weight % palladium, 0.1-35 weight % chromium, at least one member of the group consisting of molybdenum and tungsten, said member being present in an amount of up to 20 weight % and the balance consisting essentially of cobalt, (4) an alloy as in (3) but also containing boron, the boron being present in an amount of up to 1%, (5) an alloy as in (4) also containing at least one element from the group consisting of scandium, yttrium, lanthanum and another rare earth element, said element being present in an amount of up to 8 weight %, (6) an alloy as in (3) also containing at least one element from the group consisting of scandium, yttrium, lanthanum and another rare earth element, said element being present in an amount of up to 8 weight %, (7) an alloy as in (2) also containing at least one element from the group consisting of scandium, yttrium, lanthanum and another rare earth element, said element being present in an amount of up to 8 weight %, (8) an alloy as in (1) also containing at least one element from the group consisting of scandium, yttrium, lanthanum and another rare earth element, said element being present in an amount of up to 8 weight %, (9) an alloy as in (8) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (10) an alloy as in (7) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (11) an alloy as in (6) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (12) an alloy as in (5) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (13) an alloy as in (4) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (14) an alloy as in (3) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (15) an alloy as in (2) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (16) an alloy as in (1) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, or (17) consisting of 25-35 weight % palladium, 5-15 weight % chromium, 5-15 weight % molybdenum, tungsten or a mixture thereof, 2-6 weight % cerium, 0.2-0.8 weight % boron and the balance cobalt.

Claim 24

A dental ceramic composition having fired thereon as a facing of gold free alloy selected from the group consisting of (1) 1-70 weight % palladium, 0.1-35 weight % chromium and the balance consisting essentially of cobalt, (2) 1-70 weight % palladium, 0.1-35 weight % chromium, boron, the boron being present in an amount of up to 1 weight % and the balance consisting essentially of cobalt, (3) 1-70 weight % palladium, 0.1-35 weight % chromium, at least one member of the group consisting of molybdenum and tungsten, said member being present in an amount of up to 20 weight % and the balance consisting essentially of cobalt, (4) an alloy as in (3) but also containing boron, the boron being present in an amount of up to 1%, (5) an alloy as in (4) also containing at least one element from the group consisting of scandium, yttrium, lanthanum and another rare earth element, said element being present in an amount of up to 8 weight %, (6) an alloy as in (3) also containing at least one element from the group consisting of scandium, yttrium, lanthanum and another rare earth element, said element being present in an amount of up to 8 weight %, (7) an alloy as in (2) also containing at least one element from the group consisting of scandium, yttrium, lanthanum and another rare earth element, said element being present in an amount of up to 8 weight %, (8) an alloy as in (1) also containing at least one element from the group consisting of scandium, yttrium, lanthanum and another rare earth element, said element being present in an amount of up to 8 weight %, (9) an alloy as in (8) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (10) an alloy as in (7) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (11) an alloy as in (6) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (12) an alloy as in (5) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (13) an alloy as in (4) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (14) an alloy as in (3) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (15) an alloy as in (2) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (16) an alloy as in (1) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, or (17) consisting of 25-35 weight % palladium, 5-15 weight % chromium, 5-15 weight % molybdenum, tungsten or a mixture thereof, 2-6 weight % cerium, 0.2-0.8 weight % boron and the balance cobalt.

Claim 25

A crown made of the alloy of claim 16 faced with a dental ceramic composition.

Claim 26

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, also containing molybdenum, tungsten or mixture of molybdenum and tungsten, said molybdenum, tungsten or mixture thereof being present in an amount of up to 20 weight %, containing an element which is scandium, yttrium, lanthanum, another rare earth or mixture of such elements, said element or mixture of elements being present in an amount of up to 8 weight % and the balance consisting essentially of cobalt.

Claim 27

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, also containing molybdenum, tungsten or mixture of molybdenum and tungsten, said molybdenum, tungsten or mixture thereof being present in an amount of up to 20 weight %, containing an element which is scandium, yttrium, lanthanum, another rare earth or mixture of such elements, said element or mixture of elements being present in an amount of up to 8 weight % and the balance consisting essentially of cobalt.

Claim 28

A gold free alloy according to claim 18 containg 5-20 weight molybdenum, tungsten or a mixture thereof.

Claim 29

A gold free alloy according to claim 18 containing aluminum, silicon, tin, indium, gallium or mixture thereof, said aluminum, silicon, tin, indium, gallium or mixture thereof being present in an amount of up to 5 weight %.

Claim 30

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting of 25-35 weight % palladium, 5-15 weight % chromium, 5-15 weight % molybdenum, tungsten or a mixture thereof, 2-6 weight % cerium, 0.2-0.8 weight % boron and the balance cobalt.

Claim 31

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting of 25-35 weight % palladium, 5-15 weight % chromium, 5-15 weight % molybdenum, tungsten or a mixture thereof, 2-6 weight % cerium, 0.2-0.8 weight % boron and the balance cobalt.

Claim 32

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, also containing an element which is scandium, yttrium, lanthanum, another rare earth or mixture of such elements, such element or mixture of elements being present in an amount of up to 8 weight %, and containing aluminum, silicon, tin, indium, gallium, or mixture thereof, said aluminum, silicon, tin, indium, gallium, or mixture thereof being present in an amount of up to 5 weight %, and the balance consisting essentially of cobalt.

Claim 33

A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, also containing an element which is scandium, yttrium, lanthanum, another rare earth or mixture of such elements, such element or mixture of elements being present in an amount of up to 8 weight %, and containing aluminum, silicon, tin, indium, gallium, or mixture thereof, said aluminum, silicon, tin, indium, gallium, or mixture thereof being present in an amount of up to 5 weight %, and the balance consisting essentially of cobalt.