Patent US4434211A successfully refreshed from Google Patents.
US4434211A
Expired / Lapsed
US
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Method for bonding ceramic to noble based metals and product
Assignee: Individual
•
Filing: 1983-01-14
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Granted: 1984-02-28
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Expires: 2003-01-14
Abstract
Abstract A method of forming a clinically unbreakable composite structure between a noble based metal and a ceramic comprising depositing a thin layer of a bonding material including finely divided particles of a noble metal halide alone or in combination with particles of a noble metal; sintering the layer at a predetermined temperature between 1775° F. and 1975° F. and firing a ceramic over the sintered coating.
Inventors
- 👤 Itzhak Shoher
- 👤 Aharon Whiteman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:23
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/70; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/844; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049; Y10T428/12056; Y10T428/12063
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
104 words
A method for forming a clinically unbreakable composite structure between a noble based metal and a ceramic comprising the steps of depositing a thin layer of a bonding material upon the surface of said noble based metal, said bonding material comprising a composition of from about one to 100% by weight of finely divided particles of a noble metal halide and from zero to 99% by weight of finely divided substantially gold based metal particles, sintering said layer of bonding material at a predetermined temperature within a temperature range between 1775° F. to 1975° F. and firing a ceramic material over said sintered coating.
Claim 2
Independent Claim
104 words
A method for forming a clinically unbreakable composite structure between a noble based metal and a ceramic comprising the steps of depositing a thin layer of a bonding material upon the surface of said noble based metal, said bonding material comprising a composition of from about one to 100% by weight of finely divided particles of a noble metal halide and from zero to 99% by weight of finely divided substantially gold based metal particles, sintering said layer of bonding material at a predetermined temperature within a temperature range between 1775° F. to 1975° F. and firing a ceramic material over said sintered coating.
Claim 3
Dependent Claim
13 words
A method as defined in claim 1 wherein said halide is a chloride.
Claim 4
Dependent Claim
33 words
A method as defined in claim 2 wherein said noble metal halide comprises a chloride of a noble metal selected from the group of noble metals consisting of platinum, palladium, gold and silver.
Claim 5
Dependent Claim
19 words
A method as defined in claim 2 wherein said sintering temperature is between about 1850° F. to 1900° F.
Claim 6
Dependent Claim
17 words
A method as defined in claim 4 wherein said unbreakable structure is a metal porcelain tooth restoration.
Claim 7
Dependent Claim
91 words
A composite structure composed of a layer of a noble based metal, a layer of ceramic material and an intermediate layer of a material having a composition of from one to 100% by weight of finely divided particles of a noble metal halide and from zero to 99% by weight of finely divided substantially gold based metal particles formed by the method of sintering said intermediate layer at a predetermined temperature range of between 1700° F. to 1975° F. with said layer of ceramic material fired at between 1600° to 1820°.
Claim 8
Dependent Claim
91 words
A composite structure composed of a layer of a noble based metal, a layer of ceramic material and an intermediate layer of a material having a composition of from one to 100% by weight of finely divided particles of a noble metal halide and from zero to 99% by weight of finely divided substantially gold based metal particles formed by the method of sintering said intermediate layer at a predetermined temperature range of between 1700° F. to 1975° F. with said layer of ceramic material fired at between 1600° to 1820°.
Claim 9
Dependent Claim
34 words
A composite structure as defined in claim 6 wherein said noble metal halide comprises a chloride of a noble metal selected from the group of noble metals consisting of platinum, palladium, gold and silver.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-27 | 1987-08-29 | 1988-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-27 | 1991-08-29 | 1992-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-27 | 1995-08-29 | 1996-02-28 | $7700.00 | Window Closed / Lapsed |