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US4400350A Expired / Lapsed US ⏱️ 0.0 years remaining

Palladium dental alloy

Assignee: WCHERAEUS A OF GERMANY GmbH LLC
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Filing: 1982-09-29
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Granted: 1983-08-23
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Expires: 2002-09-29
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Abstract

Abstract A homogeneous fine grained palladium alloy consisting essentially of ______________________________________ Weight Percent ______________________________________ Pd 70-82 Au 0.1-10 In 5-10 Cu 2-5 Ga 0.5-5 Sn 0.5-5 Co 0.9-2.7 Re 0.01-0.3 ______________________________________ and between 0.08 and 0.25% of at least one metal selected from the group consisting of Ru and Ir.

Inventors

  • 👤 Armin C. Wagner

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 11:40
CPC Classifications
C; C22; C22C; C22C5/00; C22C5/04; A; A61; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/844

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 49 words
A homogeneous fine grained palladium alloy consisting essentially of ______________________________________ Weight Percent ______________________________________ Pd 70-82 Au 0.1-10 In 5-10 Cu 2-5 Ga 0.5-5 Sn 0.5-5 Co 0.9-2.7 Re 0.01-0.3 ______________________________________ and between 0.08 and 0.25% of at least one metal selected from the group consisting of Ru and Ir.
Claim 2
Dependent Claim 49 words
A homogeneous fine grained palladium alloy consisting essentially of ______________________________________ Weight Percent ______________________________________ Pd 70-82 Au 0.1-10 In 5-10 Cu 2-5 Ga 0.5-5 Sn 0.5-5 Co 0.9-2.7 Re 0.01-0.3 ______________________________________ and between 0.08 and 0.25% of at least one metal selected from the group consisting of Ru and Ir.
Claim 3
Dependent Claim 47 words
The alloy of claim 1 containing between 74 and 80% Pd, between 2 and 5% Au, between 6 and 8% In, between 2.5 and 3.5% Cu, between 2.5 and 4.5% Ga, between 2.5 and 3.5% Sn, between 0.63 and 2.25% Co and between 0.07 and 0.25% Rh.
Claim 4
Dependent Claim 19 words
The alloy of claim 1 or 2 containing Ru and Ir, each in an amount between 0.04 and 0.125%.
Claim 5
Dependent Claim 33 words
The alloy of claim 3 consisting essentially of ______________________________________ Weight Percent ______________________________________ Pd 79.9 Au 2 In 7 Cu 3 Ga 4 Sn 3 Co 0.9 Re 0.1 Ru 0.05 Ir 0.05 ______________________________________
Claim 6
Dependent Claim 19 words
The alloy of claim 1 or 2 containing Ru and Ir, each in an amount between 0.04 and 0.06%.

References Cited (Backward Citations)

US2132116A Cited
US2222544A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-08-22 1987-02-21 1987-08-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-08-22 1991-02-21 1991-08-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-08-22 1995-02-21 1995-08-23 $7700.00 Window Closed / Lapsed

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