Patent US2345792A successfully refreshed from Google Patents.
Patent US4040863A successfully refreshed from Google Patents.
US4040863A
Expired / Lapsed
US
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Method of treating surface of copper and its alloys
Assignee: Adeka Corp
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Filing: 1976-10-26
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Granted: 1977-08-09
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Expires: 1996-10-26
Abstract
Abstract In the surface treatment of copper and its alloys with an acidic aqueous solution of hydrogen peroxide, methylcyclohexanol or cyclohexanol or both of the two are added to the solution thereby inhibiting the hindering action of chlorine ion in removal of metals and oxide scales by dissolution.
Inventors
- 👤 Koji Kitamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:11
CPC Classifications
C; C23; C23F; C23F3/00; C23F3/04; C23F3/06; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/18; C23G; C23G1/00; C23G1/02; C23G1/10; C23G1/103
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
In a method of treating surfaces of copper and its alloys to dissolve a layer of metal or oxide scale thereon by contacting said surfaces with an acidic aqueous solution of hydrogen peroxide in the presence of chlorine ions, the improvement which comprises adding to the solution a compound selected from the group consisting of cyclohexanol, methylcyclohexanol, and mixtures thereof, in an amount effective to inhibit reduction of the dissolving activity of the solution by the chlorine ions.
Claim 2
Dependent Claim
78 words
In a method of treating surfaces of copper and its alloys to dissolve a layer of metal or oxide scale thereon by contacting said surfaces with an acidic aqueous solution of hydrogen peroxide in the presence of chlorine ions, the improvement which comprises adding to the solution a compound selected from the group consisting of cyclohexanol, methylcyclohexanol, and mixtures thereof, in an amount effective to inhibit reduction of the dissolving activity of the solution by the chlorine ions.
Claim 3
Dependent Claim
25 words
The method according to claim 1 wherein the compound is added to the solution in an amount of the range of 0.1 - 5 g./l.
Claim 4
Dependent Claim
21 words
The method according to claim 1 wherein the surface treatment is carried out at a temperature between 20° and 50° C.
References Cited (Backward Citations)
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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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |