US4186064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and electrolyte for electrodeposition of bright gold and gold alloys
Assignee: Technic Inc
•
Filing: 1978-07-10
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Granted: 1980-01-29
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Expires: 1998-07-10
Abstract
Abstract Bright gold or gold alloy electroplating employing a preformed fully neutralized salt of a cobalt or nickel metal organophosphorus chelate as the brightening agent.
Inventors
- 👤 Ronald J. Morrissey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:22
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/62; C25D3/48
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
72 words
In an electroplating bath for the deposition of bright gold or gold alloy electrodeposits, comprising an aqueous solution of a soluble gold cyanide, supporting electrolyte and brightening agent, buffered to a pH of about 4.5-6.0, the improvement which comprises employing as said brightening agent, at least one fully neutralized potassium, sodium, or ammonium salt of the codepositable metal chelate of an organophosphorus chelating agent, wherein said codepositable metal is cobalt or nickel.
Claim 2
Dependent Claim
72 words
In an electroplating bath for the deposition of bright gold or gold alloy electrodeposits, comprising an aqueous solution of a soluble gold cyanide, supporting electrolyte and brightening agent, buffered to a pH of about 4.5-6.0, the improvement which comprises employing as said brightening agent, at least one fully neutralized potassium, sodium, or ammonium salt of the codepositable metal chelate of an organophosphorus chelating agent, wherein said codepositable metal is cobalt or nickel.
Claim 3
Dependent Claim
38 words
The electroplating bath of claim 1 wherein the organophosphorus chelating agent is of the formula ##STR14## wherein R is lower alkylidene or a water soluble salt thereof, R' is H, lower alkyl or carboxyalkyl, and n is 1-3.
Claim 4
Dependent Claim
21 words
The electroplating bath of claim 2 wherein the brightening agent is the tetra salt of codepositable metal nitrilotri (methylene phosphonic acid).
Claim 5
Dependent Claim
21 words
The electroplating bath of claim 2 wherein the brightening agent is the tetra salt of codepositable metal nitrilotri (ethylidene phosphonic acid).
Claim 6
Dependent Claim
21 words
The electroplating bath of claim 2 wherein the brightening agent is the tetra salt of codepositable metal nitrilotri (isopropylidene phosphonic acid).
Claim 7
Dependent Claim
22 words
The electroplating bath of claim 2 wherein the brightening agent is the tri salt of codepositable metal N-carboxymethyl, N,N-di (methylene phosphonic acid).
Claim 8
Dependent Claim
43 words
The electroplating bath of claim 1 wherein the organophosphorus chelating agent is of the formula ##STR15## wherein R is lower alkylidene or a water soluble salt thereof, R' is H, lower alkyl or carboxyalkyl, x is 1 or 2 and y is 1-6.
Claim 9
Dependent Claim
22 words
The electroplating bath of claim 7 wherein the brightening agent is the penta salt of codepositable metal ethylenediamine tetra (methylene phosphonic acid).
Claim 10
Dependent Claim
24 words
The electroplating bath of claim 7 wherein the brightening agent is the tri salt of codepositable metal ethylenediamine N,N'-di (carboxymethyl), N,N'-di (methylene phosphonic acid.
Claim 11
Dependent Claim
21 words
The electroplating bath of claim 7 wherein the brightening agent is the penta salt of cobalt hexamethylenediamine tetra (methylene phosphonic acid).
Claim 12
Dependent Claim
23 words
The electroplating bath of claim 7 wherein the brightening agent is the tri salt of cobalt hexamethylenediamine N,N'-di (carboxymethyl), N,N'-di (methylene phosphonic acid).
Claim 13
Dependent Claim
20 words
The electroplating bath of claim 1 wherein the brightening agent is the di salt of cobalt 1-hydroxyalkylidene, 1,1 diphosphonic acid.
Claim 14
Dependent Claim
75 words
In the method of electroplating a substrate to obtain a bright gold or gold alloy electrodeposit in an aqueous solution of a soluble gold cyanide at a pH of about 4.5-6.0 in the presence of a brightening agent, the improvement which comprises employing as said brightening agent, at least one fully neutralized potassium, sodium or ammonium salt of the codepositable metal chelate of an organophosphorous chelating agent, wherein said codepositable metal is cobalt or nickel.
Claim 15
Dependent Claim
75 words
In the method of electroplating a substrate to obtain a bright gold or gold alloy electrodeposit in an aqueous solution of a soluble gold cyanide at a pH of about 4.5-6.0 in the presence of a brightening agent, the improvement which comprises employing as said brightening agent, at least one fully neutralized potassium, sodium or ammonium salt of the codepositable metal chelate of an organophosphorous chelating agent, wherein said codepositable metal is cobalt or nickel.
Claim 16
Dependent Claim
37 words
The method of claim 13 wherein said organophosphorous chelating agent is of the formula ##STR16## wherein R is lower alklidene or a water soluble salt thereof, R' is H, lower alkyl or carboxyalkyl, and n is 1-3.
Claim 17
Dependent Claim
42 words
The method of claim 13 wherein said organophosphorous chelating agent is of the formula ##STR17## wherein R is lower alkylidene or a water soluble salt thereof, R' is H, lower alkyl or carboxyalkyl, x is 1 or 2 and y is 1-6.
Claim 18
Dependent Claim
69 words
A solution for the electrodeposition of gold or gold alloys comprising an aqueous solution of a soluble gold cyanide, a supporting electrolyte, and a brightening agent wherein said brightening agent comprises at least one fully neutralized potassium, sodium or ammonium salt of the codepositable metal chelate of an organophosphorus metal chelating agent, and wherein said codepositable metal is cobalt or nickel, said solution having a pH of about 4.5-6.0.
Claim 19
Dependent Claim
69 words
A solution for the electrodeposition of gold or gold alloys comprising an aqueous solution of a soluble gold cyanide, a supporting electrolyte, and a brightening agent wherein said brightening agent comprises at least one fully neutralized potassium, sodium or ammonium salt of the codepositable metal chelate of an organophosphorus metal chelating agent, and wherein said codepositable metal is cobalt or nickel, said solution having a pH of about 4.5-6.0.
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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) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |