US4369068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gold containing preparation for coating metallic parts
Assignee: Evonik Operations GmbH
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Filing: 1981-08-10
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Granted: 1983-01-18
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Expires: 2001-08-10
Abstract
Abstract Gold-containing preparations which improve the adhesiveness, guarantee an esthetic appearance, and should make possible a saving in gold consumption are needed for the production of intermediate layers for the facings of fired on alloys in the dental art with ceramic compositions. This is accomplished with preparation that contain 50 to 94% gold powder having a particle size <30μ, 5-40% binder made of organic solvent and resin components are 1-20% of a metal powder whose particle size is greater than of the gold powder used and whose melting temperature is above that of gold.
Inventors
- 👤 Jurgen Hausselt
- 👤 Harry Schiwiora
- 👤 Manfred Stumke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:03
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/38; A; A61; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/844
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
117 words
A gold-containing preparation suitable for coating fired on alloys in the dental art before the facing with ceramic compositions, said preparation consisting essentially of gold powder, an adhesive and a binder of an organic solvent and a resin, said binder being liquid at room temperature and able to be volatilized or burned at the firing temperature, there being present 50 to 95 weight % gold powder having a particle size below 30μ, 5 to 40 weight % of the binder and 1 to 20 weight % of a metal powder as adhesive, the metal powder having an average particle size of 10 to 27 microns greater than and a melting temperature above that of the gold powder.
Claim 2
Dependent Claim
117 words
A gold-containing preparation suitable for coating fired on alloys in the dental art before the facing with ceramic compositions, said preparation consisting essentially of gold powder, an adhesive and a binder of an organic solvent and a resin, said binder being liquid at room temperature and able to be volatilized or burned at the firing temperature, there being present 50 to 95 weight % gold powder having a particle size below 30μ, 5 to 40 weight % of the binder and 1 to 20 weight % of a metal powder as adhesive, the metal powder having an average particle size of 10 to 27 microns greater than and a melting temperature above that of the gold powder.
Claim 3
Dependent Claim
29 words
A gold-containing preparation according to claim 1 containing 65 to 80 weight % gold powder, 15 to 25 weight % binder and 5 to 10 weight % metal powder.
Claim 4
Dependent Claim
18 words
A gold-containing preparation according to claim 2 wherein the particle size of the gold powder is below 10μ.
Claim 5
Dependent Claim
18 words
A gold-containing preparation according to claim 1 wherein the particle size of the gold powder is below 10μ.
Claim 6
Dependent Claim
28 words
A gold-containing preparation according to claim 4 wherein the metal powder is palladium, cobalt, or nickel or an alloy of palladium, cobalt, nickel or gold or mixtures thereof.
Claim 7
Dependent Claim
29 words
A gold containing preparation according to claim 3 wherein the metal powder is palladium, cobalt, or nickel or an alloy of palladium, cobalt, nickel or gold or mixtures thereof.
Claim 8
Dependent Claim
28 words
A gold-containing preparation according to claim 2 wherein the metal powder is palladium, cobalt, or nickel or an alloy of palladium, cobalt, nickel or gold or mixtures thereof.
Claim 9
Dependent Claim
28 words
A gold-containing preparation according to claim 1 wherein the metal powder is palladium, cobalt, or nickel or an alloy of palladium, cobalt, nickel or gold or mixtures thereof.
Claim 10
Dependent Claim
27 words
A gold-containing preparation according to claim 8 wherein the metal powder includes at least one alloying element which is present in the metallic part to be coated.
Claim 11
Dependent Claim
27 words
A gold-containing preparation according to claim 9 wherein the metal powder includes at least one alloying element which is present in the metallic part to be coated.
Claim 12
Dependent Claim
27 words
A gold-containing preparation according to claim 8 wherein the metal powder includes at least one alloying element which is present in the metallic part to be coated.
Claim 13
Dependent Claim
27 words
A gold-containing preparation according to claim 7 wherein the metal powder includes at least one alloying element which is present in the metallic part to be coated.
Claim 14
Dependent Claim
27 words
A gold-containing preparation according to claim 6 wherein the metal powder includes at least one alloying element which is present in the metallic part to be coated.
Claim 15
Dependent Claim
27 words
A gold-containing preparation according to claim 5 wherein the metal powder includes at least one alloying element which is present in the metallic part to be coated.
Claim 16
Dependent Claim
47 words
A gold-containing preparation according to claim 8 including an alloying element present in the metallic part to be coated, said alloying element being a member of the group consisting of tin, indium, chromium, molybdenum, silicon, manganese, iron, and mixtures of at least two of said alloying elements.
Claim 17
Dependent Claim
24 words
A gold-containing preparation according to claim 8 wherein the binder contains 10 to 40 weight % resin and 60 to 90 weight % solvent.
Claim 18
Dependent Claim
24 words
A gold-containing preparation according to claim 7 wherein the binder contains 10 to 40 weight % resin and 60 to 90 weight % solvent.
Claim 19
Dependent Claim
48 words
A gold containing preparation according to claim 8 including an alloying element present in the metallic part to be coated, said alloying element being a metal selected from the group consisting of tin, indium, chromium, molybdenum, manganese, iron, and mixtures of at least two of said alloying elements.
References Cited (Backward Citations)
US3450545A
Cited
US3872360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |