Patent DE2139331A1 successfully refreshed from Google Patents.
DE2139331A1
Expired / Lapsed
DE
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Copper-free dental gold alloys - non discolouring
Assignee: Evonik Operations GmbH
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Filing: 1971-08-06
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Granted: —
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Expires: 1991-08-06
Abstract
Abstract Copper free dental gold alloys which do not discolour due to oxidation and attack of air after internal electrolytic reactions when in contact with saliva, containing alloying additions of Ag, Pd, Ir, In, Pt, Sn and Zn are prepared. These alloys are sufficiently hard and can be used in conjunction with dental porcelain. Hardness is found to be governed by the Pd content. Typical compositions are within the limits 65-85% au; 4-20% Ag; 2-10% Pd; 2-10% Pt; 2-4% In; 0.5-2% Zn; 0.5-2% Sn; 0.05-0.5% Ir.
Inventors
- 👤 Ewald Dr Wagner
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-28 13:47
CPC Classifications
C; C22; C22C; C22C5/00; C22C5/02; A; A61; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/844
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