Patent US4539176A successfully refreshed from Google Patents.
US4539176A
Expired / Lapsed
US
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Low gold dental alloys
Assignee: J F JELENKO & Co 99 BUSINESS PARK DRIVE ARMONK NEW YORK 10504
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Filing: 1984-05-04
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Granted: 1985-09-03
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Expires: 2004-05-04
Abstract
Abstract A silverless low gold dental alloy contains, by weight, 10-40% gold; 3-8% gallium; 0.5-10% indium and/or tin; 0.1 to 1.5% ruthenium, or iridium, or rhenium; balance palladium. The alloy is non-staining and bondable to and compatible with porcelain.
Inventors
- 👤 Paul J. Cascone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:30
CPC Classifications
C; C22; C22C; C22C5/00; C22C5/04; A; A61; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/844
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
50 words
A low gold dental alloy consisting essentially of, by weight, about 10-40% gold; about 3-8% gallium; about 0.5-10% of at least one element selected from the group consisting of indium and tin; and about 0.1-1.5% of an element selected from the group consisting of ruthenium, iridium, and rhenium; balance palladium.
Claim 2
Dependent Claim
50 words
A low gold dental alloy consisting essentially of, by weight, about 10-40% gold; about 3-8% gallium; about 0.5-10% of at least one element selected from the group consisting of indium and tin; and about 0.1-1.5% of an element selected from the group consisting of ruthenium, iridium, and rhenium; balance palladium.
Claim 3
Dependent Claim
33 words
A low gold dental alloy consisting essentially of, by weight, about 15 to 35% gold, about 4.5 to 6.5% gallium, about 2 to 6% tin, about 0.1 to 0.8% ruthenium, and balance palladium.
Claim 4
Dependent Claim
33 words
A low gold dental alloy consisting essentially of, by weight, about 15 to 35% gold, about 4.5 to 6.5% gallium, about 2 to 6% tin, about 0.1 to 0.8% ruthenium, and balance palladium.
Claim 5
Dependent Claim
17 words
Alloy of claim 2 comprising, by weight, 35% gold, 5% gallium, 2.8% tin, 0.6% ruthenium, balance palladium.
Claim 6
Dependent Claim
17 words
Alloy of claim 1 comprising, by weight, 35% gold, 5% gallium, 3% indium, 0.6% ruthenium, balance palladium.
Claim 7
Dependent Claim
17 words
Alloy of claim 1 comprising, by weight, 29.5% gold, 4.7% gallium, 2% indium, 0.1% ruthenium, balance palladium.
Claim 8
Dependent Claim
19 words
Alloy of claim 1 comprising, by weight, 25% gold, 6% gallium, 2% tin, 2% indium, 0.12% ruthenium, balance palladium.
Claim 9
Dependent Claim
17 words
Alloy of claim 3 comprising, by weight, 22.1% gold, 4.8% gallium, 4.1% tin, 0.1% ruthenium, balance palladium.
Claim 10
Dependent Claim
17 words
Alloy of claim 1 comprising, by weight, 20% gold, 4% gallium, 10% indium, 0.8% ruthenium, balance palladium.
Claim 11
Dependent Claim
19 words
Alloy of claim 1 comprising, by weight, 17.9% gold, 3.6% gallium, 6.1% tin, 4% indium, 0.1% ruthenium, balance palladium.
Claim 12
Dependent Claim
17 words
Alloy of claim 1 comprising, by weight, 17.6% gold, 6.2% gallium, 5.1% indium, 0.1% ruthenium, balance palladium.
Claim 13
Dependent Claim
19 words
Alloy of claim 1 comprising, by weight, 15.5% gold, 6% gallium, 4% tin, 2% indium, 0.1% ruthenium, balance palladium.
Claim 14
Dependent Claim
17 words
Alloy of claim 1 comprising, by weight, 11% gold, 7.8% gallium, 1.6% tin, 0.12% ruthenium, balance palladium.
Claim 15
Dependent Claim
27 words
Alloy of claim 3 having a yield strength of 81,000 psi, an elongation in 1" of 8%, and a linear thermal expansion at 600° C. of 0.808%.
Claim 16
Dependent Claim
27 words
Alloy of claim 4 having a yield strength of 78,000 psi, an elongation in 1" of 28%, and a linear thermal expansion at 600° C. of 0.799%.
Claim 17
Dependent Claim
27 words
Alloy of claim 5 having a yield strength of 68,000 psi, an elongation in 1" of 25%, and a linear thermal expansion at 600° C. of 0.808%.
Claim 18
Dependent Claim
27 words
Alloy of claim 6 having a yield strength of 75,000 psi, an elongation in 1" of 10%, and a linear thermal expansion at 600° C. of 0.809%.
Claim 19
Dependent Claim
27 words
Alloy of claim 7 having a yield strength of 64,000 psi, an elongation in 1" of 30%, and a linear thermal expansion at 600° C. of 0.800%.
Claim 20
Dependent Claim
27 words
Alloy of claim 8 having a yield strength of 73,000 psi, an elongation in 1" of 41%, and a linear thermal expansion at 600° C. of 0.823%.
Claim 21
Dependent Claim
27 words
Alloy of claim 9 having a yield strength of 62,000 psi, an elongation in 1" of 36%, and a linear thermal expansion at 600° C. of 0.800%.
Claim 22
Dependent Claim
27 words
Alloy of claim 10 having a yield strength of 75,000 psi, an elongation in 1" of 23%, and a linear thermal expansion at 600° C. of 0.812%.
Claim 23
Dependent Claim
27 words
Alloy of claim 11 having a yield strength of 75,000 psi, an elongation in 1" of 33%, and a linear thermal expansion at 600° C. of 0.812%.
Claim 24
Dependent Claim
27 words
Alloy of claim 12 having a yield strength of 77,000 psi, an elongation in 1" of 18% and a linear thermal expansion at 600° C. of 0.828%.
References Cited (Backward Citations)
US3134671A
Cited
US3136634A
Cited
US3819366A
Cited
US4008080A
Cited
US4179286A
Cited
GB2048939A
Cited
DE3146794A1
Cited
JPS58107436A
Cited
US4419325A
Cited
US4400350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |