Patent US4222828A successfully refreshed from Google Patents.
US4222828A
Expired / Lapsed
US
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Process for electro-codepositing inorganic particles and a metal on a surface
Assignee: Akzo NV
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Filing: 1979-06-04
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Granted: 1980-09-16
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Expires: 1999-06-04
Abstract
Abstract A process is provided for the electrolytic codeposition of a metal and solid inorganic particles on an article acting as a cathode. The particles have an average size of less than 300 mu m and are used in a concentration of 10 to 150 grams per liter of plating bath liquid. The inorganic particles are kept suspended in the bath liquid with a cationic fluorocarbon surfactant present in an amount which is at least the same weight ratio to the particles in the bath liquid as the ratio of surfactant to particles required in an 0.005 N KNO3- solution for the particles to assume a zeta-potential of at least +40 mV. Preferably the surfactant consists of a cationic fluorocarbon compound having the structural formulae: <IMAGE> +TR <IMAGE>
Inventors
- 👤 Eduard Zuurdeeg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:44
CPC Classifications
C; C25; C25D; C25D15/00; C25D15/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
118 words
In a process for the codeposition from an electroplating bath of a metal and solid inorganic particles on an article acting as a cathode, which particles are kept suspended in the bath liquid in the presence of a surfactant and have an average size of less than 300 μm and are used in a concentration of 10 to 150 grams per liter of bath liquid, characterized in that the surfactant is a cationic fluorocarbon compound in at least the same weight ratio to the particles in the bath liquid as in an 0.005 N KNO 3 -solution in which the particles assume a zeta-potential of at least +40 mV with the exclusive use of said cationic fluorocarbon compound.
Claim 2
Dependent Claim
118 words
In a process for the codeposition from an electroplating bath of a metal and solid inorganic particles on an article acting as a cathode, which particles are kept suspended in the bath liquid in the presence of a surfactant and have an average size of less than 300 μm and are used in a concentration of 10 to 150 grams per liter of bath liquid, characterized in that the surfactant is a cationic fluorocarbon compound in at least the same weight ratio to the particles in the bath liquid as in an 0.005 N KNO 3 -solution in which the particles assume a zeta-potential of at least +40 mV with the exclusive use of said cationic fluorocarbon compound.
Claim 3
Dependent Claim
47 words
The process of claim 1, characterized in that the amount of cationic fluorocarbon compound is equal to that required in a 0.005 N KNO 3 solution for the particles to assume a zeta-potential of at least +60 mV with the exclusive use of said cationic fluorocarbon compound.
Claim 4
Dependent Claim
25 words
The process of claim 1 or 2, characterized in that the cationic fluorocarbon compound is a compound having one of the following structural formulae: ##STR15##
Claim 5
Dependent Claim
24 words
The process according to claim 1 or 2 characterized in that besides solid inorganic particles, solid particles of a different kind are simultaneously deposited.
Claim 6
Dependent Claim
20 words
The process according to claim 4, characterized in that the said different kind of solid particles are inorganic particles, too.
Claim 7
Dependent Claim
19 words
The process according to claim 4, characterized in that the said different kind of solid particles are organic particles.
Claim 8
Dependent Claim
49 words
In a process for electrolytically codepositing a metal and particles of an inorganic compound simultaneously on a cathode which comprises depositing said metal and particles from a bath containing as the only surfactant a cationic fluorocarbon surfactant and the said particles have a zeta-potential of at least +40 mV.
Claim 9
Dependent Claim
49 words
In a process for electrolytically codepositing a metal and particles of an inorganic compound simultaneously on a cathode which comprises depositing said metal and particles from a bath containing as the only surfactant a cationic fluorocarbon surfactant and the said particles have a zeta-potential of at least +40 mV.
Claim 10
Dependent Claim
8 words
The product of the process of claim 7.
Claim 11
Dependent Claim
15 words
The process of claim 4 wherein said different kind of particles are organic fluorocarbon particles.
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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) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |