US3620822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of copper plating super-refined steel
Assignee: Henkel Corp
•
Filing: 1968-11-22
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Granted: 1971-11-16
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Expires: 1988-11-22
Abstract
Abstract A process for the currentless copper plating of super refined steel wherein the steel is contacted with a solution containing copper, hydrogen and fluoride ions, but no inhibitors, to produce, through cementation, a copper coating on the steel. The concentration of the fluoride ions and hydrogen ions in the plating solution are maintained within specified, varying ranges, depending upon the temperature at which the coating bath is operated. In this manner, a currentless copper coating is produced on super-refined steel, which steel has not heretofore been coatable in this manner.
Inventors
- 👤 Han Yong Oei
- 👤 Siegfried Moller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:25
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
25 words
The process as claimed in claim 1 wherein the coating solution contains from about 5 to 60 grams per liter of copper calculated as CuS04.5H20.
Claim 2
Dependent Claim
25 words
The process as claimed in claim 2 wherein the coating solution also contains at least one additional ion selected from nitrate, sulfate and chloride ions.
Claim 3
Dependent Claim
28 words
The process as claimed in claim 3 wherein the treatment of the surface is carried out at a temperature within the range of 20 to 70 degrees C.
Claim 4
Dependent Claim
24 words
The process as claimed in claim 4 wherein the treatment of the surface is carried out at a temperature of about 20 degrees C.
References Cited (Backward Citations)
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Cited
US2217921A
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US2410844A
Cited
US2472393A
Cited
US2445372A
Cited
US2825682A
Cited
US2814589A
Cited
US3280038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |