US4487665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroplating bath and process for white palladium
Assignee: OMI International Corp
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Filing: 1980-12-17
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Granted: 1984-12-11
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Expires: 2000-12-17
Abstract
Abstract Particular electroplating baths suitable for obtaining white deposits of palladium metal. The bath comprises (a) palladosamine chloride; (b) an ammonium salt such as ammonium sulfate or ammonium chloride; (c) chloride ions; and (d) a brightener selected from the group of organic brighteners, inorganic brighteners, and mixtures thereof. The process of using such electroplating baths to produce white deposits of palladium metal on substrates is also disclosed and claimed.
Inventors
- 👤 Kathleen B. Miscioscio
- 👤 Paul T. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:26
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/50
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
A stable, aqueous electroplating bath suitable for obtaining thin white deposits of palladium metal which consists essentially of a bath soluble source of pure palladium metal free of alloying elements, which source is present in an amount sufficient to provide from about 0.1 to 20 g/l palladium in the bath, from about 25 to 120 g/l of a bath soluble ammonium conductivity salt, from about 0.5 to 5 g/l of an organic brightener selected from Class I and Class II nickel brighteners, from about 0.1 and 1 g/l of an inorganic brightener and 2.5 to 15 g/l of chloride ions furnished by potassium chloride.
Claim 2
Dependent Claim
104 words
A stable, aqueous electroplating bath suitable for obtaining thin white deposits of palladium metal which consists essentially of a bath soluble source of pure palladium metal free of alloying elements, which source is present in an amount sufficient to provide from about 0.1 to 20 g/l palladium in the bath, from about 25 to 120 g/l of a bath soluble ammonium conductivity salt, from about 0.5 to 5 g/l of an organic brightener selected from Class I and Class II nickel brighteners, from about 0.1 and 1 g/l of an inorganic brightener and 2.5 to 15 g/l of chloride ions furnished by potassium chloride.
Claim 3
Dependent Claim
84 words
A stable, aqueous electroplating bath suitable for obtaining thin, white deposits of palladium metal which consists essentially of a bath soluble source of pure palladium metal free of alloying elements present in an amount sufficient to provide from 1 to 6 g/l palladium in the bath, from 30-70 g/l of a bath soluble ammonium conductivity salt, from about 0.5 to 5 g/l of an organic brightener selected from Class I and Class II nickel brighteners, and from about 0.2 to 0.5 of nickel sulfate.
Claim 4
Dependent Claim
84 words
A stable, aqueous electroplating bath suitable for obtaining thin, white deposits of palladium metal which consists essentially of a bath soluble source of pure palladium metal free of alloying elements present in an amount sufficient to provide from 1 to 6 g/l palladium in the bath, from 30-70 g/l of a bath soluble ammonium conductivity salt, from about 0.5 to 5 g/l of an organic brightener selected from Class I and Class II nickel brighteners, and from about 0.2 to 0.5 of nickel sulfate.
Claim 5
Dependent Claim
86 words
A stable, aqueous electroplating bath suitable for obtaining thin, white deposits of palladium metal which consists essentially of a bath soluble source of pure palladium metal free of alloying elements present in an amount sufficient to provide from 1 to 6 g/l palladium in the bath, from 30-70 g/l of a bath soluble ammonium conductivity salt, from about 0.5 to 5 g/l of an organic brightner selected from Class I and Class II nickel brightners, and from about 0.2 to 0.5 g/l of ammonium nickel sulfate.
Claim 6
Dependent Claim
86 words
A stable, aqueous electroplating bath suitable for obtaining thin, white deposits of palladium metal which consists essentially of a bath soluble source of pure palladium metal free of alloying elements present in an amount sufficient to provide from 1 to 6 g/l palladium in the bath, from 30-70 g/l of a bath soluble ammonium conductivity salt, from about 0.5 to 5 g/l of an organic brightner selected from Class I and Class II nickel brightners, and from about 0.2 to 0.5 g/l of ammonium nickel sulfate.
Claim 7
Independent Claim
55 words
A method of depositing white deposits of palladium metal on a substrate which comprises passing an electric current through the electroplating baths of claims 1, 2 or 3 between a cathode and an anode for a period of time sufficient to produce a palladium electrodeposit having a thickness of from about 0.01 to 1.0 microns.
References Cited (Backward Citations)
US3458409A
Cited
US3580820A
Cited
US3677909A
Cited
US3925170A
Cited
US4066517A
Cited
US4098656A
Cited
US4297177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |