Patent US3878066A successfully refreshed from Google Patents.
US3878066A
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Bath for galvanic deposition of gold and gold alloys
Assignee: FUCHS KARL#HANS
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Filing: 1973-08-29
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Granted: 1975-04-15
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Expires: 1993-08-29
Abstract
Abstract Galvanic baths are provided for the deposition of gold or gold alloy coatings, such baths containing in combination aldehyde and nitrogen compounds with arsenic compounds.
Inventors
- 👤 Manfred Dettke
- 👤 Karl-Hans Fuchs
- 👤 Rolf Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:47
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/62; C25D3/48
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
200 words
AN AQUEOUS BATH FOR THE ELECTRODEPOSITION OF GOLD OR GOLD ALLOYS HAVING A HIGH GLOSS, SAID BATH HAVING A PH OF FROM ABOUT 5 TO 10 AND AN AMOUNT OF COMPONENTS, A, B AND C TO PROVIDE A COATING HAVING HIGH GLOSS AND EXTRAORDINARY ADHESION, SAID BATH COMPRISING A. FROM ABOUT 0.005 TO 50 GRAMS PER LITER OF AT LEAST ONE COMPOUND OF THE GENERAL FORMULA RCHO WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, METHYL, AND THE GROUP -CHO, AND AN ALDEHYDE BISULFITE ADDITION COMPOUND THEREOF, AND B. FROM ABOUT 0.1 TO 50 GRAMS PER LITER OF AT LEAST ONE COMPOUND OF THE GENERAL FORMULA R2N-(R''-NR)M-(R'' )N-NR IN WHICH EACH R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL HAVING FROM 1 TO 5 CARBON ATOMS AND HYDROXY-SUBSTITUTED ALKYL HAVING FROM 1 TO 5 CARBON ATOMS, M AND N IS 0 OR AN INTEGER FROM 1 TO 3, AND C. FROM ABOUT 0.001 TO 5 GRAMS PER LITER OF AT LEAST ONE ALKALI METAL SALT OF A MEMBER OF THE GROUP CONSISTING OF ARSENIC ACID AND ARSENIOUS ACID, AND D. A WATER SOLUBLE GOLD COMPOUND IN AN AMOUNT OF ABOUT 1 TO 50 GRAMS PER LITER.
Claim 2
Dependent Claim
200 words
AN AQUEOUS BATH FOR THE ELECTRODEPOSITION OF GOLD OR GOLD ALLOYS HAVING A HIGH GLOSS, SAID BATH HAVING A PH OF FROM ABOUT 5 TO 10 AND AN AMOUNT OF COMPONENTS, A, B AND C TO PROVIDE A COATING HAVING HIGH GLOSS AND EXTRAORDINARY ADHESION, SAID BATH COMPRISING A. FROM ABOUT 0.005 TO 50 GRAMS PER LITER OF AT LEAST ONE COMPOUND OF THE GENERAL FORMULA RCHO WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, METHYL, AND THE GROUP -CHO, AND AN ALDEHYDE BISULFITE ADDITION COMPOUND THEREOF, AND B. FROM ABOUT 0.1 TO 50 GRAMS PER LITER OF AT LEAST ONE COMPOUND OF THE GENERAL FORMULA R2N-(R''-NR)M-(R'' )N-NR IN WHICH EACH R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL HAVING FROM 1 TO 5 CARBON ATOMS AND HYDROXY-SUBSTITUTED ALKYL HAVING FROM 1 TO 5 CARBON ATOMS, M AND N IS 0 OR AN INTEGER FROM 1 TO 3, AND C. FROM ABOUT 0.001 TO 5 GRAMS PER LITER OF AT LEAST ONE ALKALI METAL SALT OF A MEMBER OF THE GROUP CONSISTING OF ARSENIC ACID AND ARSENIOUS ACID, AND D. A WATER SOLUBLE GOLD COMPOUND IN AN AMOUNT OF ABOUT 1 TO 50 GRAMS PER LITER.
Claim 3
Dependent Claim
47 words
A bath adding to claim 1 which contains about 10 to 200 grams per liter of boric acid and about 10 to 200 grams per liter of a polyvalent alcohol, the ratio of boric acid to polyvalent alcohol being from about 1:1 to about 1:2, by weight.
Claim 4
Dependent Claim
13 words
A bath according to claim 2 wherein the polyvalent alcohol is ethylene glycol.
Claim 5
Dependent Claim
40 words
A bath according to claim 1 wherein component A is selected from the group consisting of formaldehyde, acetaldehyde and glyoxal and component B is selected from the group consisting of hydrazine, methyl hydrazine, N-(3-propyl-1,2-diol)-diethylene triamine, triethylene tetramine and salts thereof.
Claim 6
Dependent Claim
59 words
A BATH ACCORDING TO CLAIM 1 FOR ELECTRODEPOSITION OF GOLD ALLOY CONTAINING AT LEAST ONE ALLOY METAL SELECTED FROM THE GROUP CONSISTING OF SILVER, COPPER, ZINC, CADMIUM, COBATH, NICKEL, PALLADIUM, INDIUM, MANGANESE, ANTIMONY AND TIN WHEREIN THE ALLOY-METALS ARE ADDED TO THE BATH IN THE FORM OF WATER-SOLUBLE COMPOUNDS IN AMOUNTS OF ABOUT 0.01 TO 200 GRAMS PER LITER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |