US3716356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rhenium containing gold alloys
Assignee: J M NEY CO US
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Filing: 1970-09-23
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Granted: 1973-02-13
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Expires: 1990-09-23
Abstract
Abstract There is disclosed a novel and improved gold alloy containing at least about 5.5 per cent of palladium and about 0.03 to 1.0 per cent by weight of rhenium, and either or both of platinum and iron when the palladium content is less than 25.0 per cent.
Inventors
- 👤 A Burnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:12
CPC Classifications
C; C22; C22C; C22C5/00; C22C5/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
159 words
A gold alloy consisting essentially of about 5.5 to 40.0 percent palladium, 0.0 to 10.0 percent platinum, 0.03 to 1.0 percent rhenium, 0.0 to 2.0 percent silver, 0.0 to 1.0 percent iron, 0.0 to 1.5 percent zinc, 0.0 to 2.0 percent tin, 0.0 to 1.0 percent indium, and the balance gold, said gold being present in an amount of about 59.0 to 94.47 percent, the total palladium and platinum in said alloy not exceeding 40.0 percent with said platinum being less than said palladium, all based upon the total weight of said alloy, provided that when said palladium is less than about 25.0 percent of said alloy there is present at least one modifying metal selected from the group consisting of iron and platinum to produce fine grain structure, said platinum modifying metal being present in an amount of at least about 1.0 percent, and said iron modifying metal being present in an amount of at least 0.3 percent.
Claim 2
Dependent Claim
159 words
A gold alloy consisting essentially of about 5.5 to 40.0 percent palladium, 0.0 to 10.0 percent platinum, 0.03 to 1.0 percent rhenium, 0.0 to 2.0 percent silver, 0.0 to 1.0 percent iron, 0.0 to 1.5 percent zinc, 0.0 to 2.0 percent tin, 0.0 to 1.0 percent indium, and the balance gold, said gold being present in an amount of about 59.0 to 94.47 percent, the total palladium and platinum in said alloy not exceeding 40.0 percent with said platinum being less than said palladium, all based upon the total weight of said alloy, provided that when said palladium is less than about 25.0 percent of said alloy there is present at least one modifying metal selected from the group consisting of iron and platinum to produce fine grain structure, said platinum modifying metal being present in an amount of at least about 1.0 percent, and said iron modifying metal being present in an amount of at least 0.3 percent.
Claim 3
Dependent Claim
22 words
The gold alloy of claim 1 wherein said rhenium is present in the amount of about 0.08 to 0.3 percent by weight.
Claim 4
Dependent Claim
37 words
The gold alloy of claim 1 wherein said palladium is present in the amount of 5.5 to 15.0 percent by weight, platinum is not present and iron is present in the amount of 0.3 to 1.0 percent.
Claim 5
Dependent Claim
36 words
The gold alloy of claim 1 wherein said palladium is present in the amount of 5.5 to 12.0 percent by weight and said platinum is present in the amount of 2.0 to 7.0 percent by weight.
Claim 6
Dependent Claim
19 words
The gold alloy of claim 4 wherein iron is present in the amount of about 0.3 to 1.0 percent.
Claim 7
Dependent Claim
17 words
The gold alloy of claim 1 wherein there is present at least 1.0 percent by weight platinum.
Claim 8
Dependent Claim
40 words
The gold alloy of claim 1 wherein the ratio of rhenium to gold is within the range of 0.0005 to 0.017:1.0 and the ratio of Group VIII metals to gold is in the range of about 0.03 to 0.67: 1.0.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |