Patent EP0188249A2 successfully refreshed from Google Patents.
EP0188249A2
Expired / Lapsed
EP
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Metal foil for preparing a dental coping and crown for a ceramo-metal restoration
Assignee: Individual
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Filing: 1986-01-10
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Granted: —
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Expires: 2006-01-10
Abstract
Abstract A dental coping for use in preparing a ceramo-metal dental restoration upon which a ceramic veneer is applied and fired comprising a metal laminated structure having multiple layers of precious metal characterized by an intermediate layer of palladium and at least one gold layer on each side thereof.
Inventors
- 👤 Itzhak Dr. Shoher
- 👤 Aharon Whiteman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 02:47
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/0003; A61C5/00; A61C5/70; A61C5/77; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/844; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12431; Y10T428/12438; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12868
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
66 words
A dental coping for use in preparing a ceramo-metal dental restoration defined by a metal laminated structure having multiple layers of precious metal characterized by at least one intermediate precious metal layer composed of from 50 to 100% palladium with the remainder, if any, substantially of gold and at least two precious metal layers composed substantially or entirely of gold symmetrically disposed about said palladium layer.
Claim 2
Dependent Claim
66 words
A dental coping for use in preparing a ceramo-metal dental restoration defined by a metal laminated structure having multiple layers of precious metal characterized by at least one intermediate precious metal layer composed of from 50 to 100% palladium with the remainder, if any, substantially of gold and at least two precious metal layers composed substantially or entirely of gold symmetrically disposed about said palladium layer.
Claim 3
Dependent Claim
23 words
A dental coping as defined in claim 1 consisting of a single palladium layer with at least one gold layer on each side.
Claim 4
Dependent Claim
17 words
A dental coping as defined in claim 2 wherein each layer of gold is equal in thickness.
Claim 5
Dependent Claim
41 words
A dental coping as defined in claims 2 or 3 wherein said layer of said palladium has a thickness of between 15 and 50 microns and wherein each layer of gold has a thickness of between about 4 to 30 microns.
Claim 6
Dependent Claim
33 words
A dental coping as defined in claim 4 wherein said layer of said palladium has a thickness of 35 microns and wherein each layer of gold has a thickness of about 14 microns.
Claim 7
Dependent Claim
54 words
A dental coping as defined in claim 5 wherein said layer of palladium alloy comprises about 54% palladium and about 35% gold, with the remainder selected in combination from the group consisting of silver, copper, iridium and platinum with the element iridium present, if at all, in a small amount relative to the others.
Claim 8
Dependent Claim
55 words
A dental coping as defined in claim 1 comprising a high fusing temperature component represented by at least one layer of palladium bounded between a layer substantially of gold on each side thereof and further comprising a low fusing temperature component of gold superimposed on at least one side of said high fusing temperature component
Claim 9
Dependent Claim
54 words
A dental crown comprising a metal coping defined by a metal laminated structure characterized by a layer of a high fusing temperature precious metal alloy composed substantially or entirely of palladium with a layer substantially of gold on each side thereof and with a ceramic veneer covering all or part of the metal coping.
Claim 10
Dependent Claim
54 words
A dental crown comprising a metal coping defined by a metal laminated structure characterized by a layer of a high fusing temperature precious metal alloy composed substantially or entirely of palladium with a layer substantially of gold on each side thereof and with a ceramic veneer covering all or part of the metal coping.
Claim 11
Dependent Claim
28 words
A dental crown as claimed in claim 8 wherein said layer of palladium contains from about 50% to 100% palladium with fhe remainder, if any, substantially of gold.
Claim 12
Dependent Claim
35 words
Use of a dental coping as claimed in any of claims 1 to 7 for preparing a ceramo-metal dental restoration by applying upon said coping a ceramic veneer and firing the product in a furnace.
References Cited (Backward Citations)
No citation records indexed.
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