US4284665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coating an electrically nonconductive material with metal
Assignee: Outokumpu Oyj
•
Filing: 1979-12-20
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Granted: 1981-08-18
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Expires: 1999-12-20
Abstract
Abstract A process for coating an electrically nonconductive material with a metal by attaching a less noble metal or a compound thereof, in pulverous form, to the surface of the electrically nonconductive material and spraying a solution of the nobler metal on the surface thus coated in order to cause the nobler metal to adhere to the surface.
Inventors
- 👤 Seppo O. Heimala
- 👤 Frans H. Tuovinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:58
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/54
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
103 words
A process for coating an electrically nonconductive material with a metal, comprising impregnating the surface of the nonconductive material with a metal or compound thereof in pulverous form less noble than the metal used for coating the surface of the nonconductive material, by first applying a coarser powder of said less noble metal or compound having a particle size of approximately 50-500 μm and then, on the surface, applying a finer powder of said less noble metal or compound having a particle size of 1-50 μm, and finally spraying a solution of the nobler metal on the surface of the electrically nonconductive material.
Claim 2
Dependent Claim
103 words
A process for coating an electrically nonconductive material with a metal, comprising impregnating the surface of the nonconductive material with a metal or compound thereof in pulverous form less noble than the metal used for coating the surface of the nonconductive material, by first applying a coarser powder of said less noble metal or compound having a particle size of approximately 50-500 μm and then, on the surface, applying a finer powder of said less noble metal or compound having a particle size of 1-50 μm, and finally spraying a solution of the nobler metal on the surface of the electrically nonconductive material.
Claim 3
Dependent Claim
29 words
The process of claim 1, in which the solution of the nobler metal is sprayed at a pressure of 0.5-3 bar by nozzles with a diameter of 1.7-3.0 mm.
Claim 4
Dependent Claim
21 words
The process of claim 1 or 2, in which the pH of the solution of the nobler metal is over 1.5.
Claim 5
Dependent Claim
18 words
The process of claim 1 or 2, comprising spraying a solution having a copper concentration of 20-100 g/l.
Claim 6
Dependent Claim
26 words
The process of claim 1, comprising attaching the powder to the surface of the electrically nonconductive material at a rate of 200 g-2 Kg/m 2 .
Claim 7
Dependent Claim
21 words
The process of claim 1, in which the solution is sprayed on the said surface at a velocity of 0.5-50 m/s.
Claim 8
Dependent Claim
20 words
The process of claim 1, in which the size of the drops of solution in the spray is 10-3000 μm.
References Cited (Backward Citations)
US99806A
Cited
US2351940A
Cited
GB571183A
Cited
US2690401A
Cited
US2748023A
Cited
US3084063A
Cited
US3226256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |