US3819366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental alloy
Assignee: ARGEN PRECIOUS METALS Inc
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Filing: 1972-06-05
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Granted: 1974-06-25
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Expires: 1992-06-05
Abstract
Abstract A precious alloy for use in dental frames on which ceramic coverings or acrylic coverings are formed. Palladium is used in an amount ranging between 8 and 76 weight percent and indium is used in an amount ranging between 0.2 and 18 weight percent. The remainder of the alloy consists primarily of gold, or gold and silver, or silver and small amounts of trace metals. Zinc may also be included as part of the alloy. With such an alloy, there is no need for the use of platinum as in the prior art dental alloys and such alloys, according to this invention, have the same desirable characteristics as those of the prior art.
Inventors
- 👤 M Katz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:01
CPC Classifications
C; C22; C22C; C22C5/00; A; A61; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/844
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
27 words
The invention according to claim 1 wherein said precious metal alloy further includes 0.1-80 weight percent silver and wherein said compatible alloy includes 0.2-10 weight percent zinc.
Claim 2
Dependent Claim
27 words
The invention according to claim 1 wherein said precious metal alloy further includes 0.1-74 weight percent gold and wherein said compatible alloy includes 0.2-15 weight percent zinc.
Claim 3
Dependent Claim
32 words
The invention according to claim 1 wherein said precious metal alloy further includes 0.1-78 weight percent gold and 0.1-74 weight percent silver and wherein said compatible alloy includes 0.2-14 weight percent zinc.
Claim 4
Dependent Claim
24 words
The invention according to claim 1 wherein said compatible alloy includes said precious metal alloy in an amount at least 98 1/4 weight percent.
Claim 5
Dependent Claim
16 words
The invention according to claim 5 wherein said precious metal alloy includes 0.1-78 weight percent gold.
Claim 6
Dependent Claim
16 words
The invention according to claim 5 wherein said precious metal alloy includes 0.1-74 weight percent silver.
Claim 7
Dependent Claim
21 words
The invention according to claim 5 wherein said precious metal alloy includes 0.1-74 weight percent gold and 0.1-72 weight percent silver.
References Cited (Backward Citations)
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US1987451A
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US2967792A
Cited
GB803379A
Cited
US2980998A
Cited
US3136634A
Cited
US3666540A
Cited
US3667936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |