Patent US2861929A successfully refreshed from Google Patents.
US2861929A
Expired / Lapsed
US
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Copper plating with addition agents
Assignee: EIDP Inc
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Filing: 1957-06-20
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Granted: 1958-11-25
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Expires: 1977-06-20
Abstract
No abstract record available.
Inventors
- 👤 Martin Donnan
- 👤 Arthur H Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:54
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/38; C25D3/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
THE PROCESS FOR ELECTROPLATING COPPER WHICH COMPRISES ELECTRODEPOSITING COPPER FROM AN AQUEOUS COPPER CYANIDE SOLUTION CONTAINING FREE CYANIDE SELECTED FROM THE GROUP CONSISTING OF SODIUM CYANIDE AND POTASSIUM CYANIDE, SAID SOLUTION CONTAINING BETWEEN 0.025 TO 0.5 GRAMS PER LITER OF AN ALKALI METAL SALT OF METHYLENE-BISA-NAPHTHALENE SULFONIC ACID AND BETWEEN ABOUT 10 AND 250 P.P.M. BY WEIGHT OF SELENIUM AS A COMPOUND SELECTED FROM THE GROUP CONSISTING OF SELENATES AND SELENITES, AND ADDITIONALLY BETWEEN ABOUT 0.01 TO 0.1 P.P.M. BY WEIGHT OF SELENIUM AS A SELENIDE COMPOUND, SUBJECTING SAID SOLUTION TO A REVERSE CURRENT CYCLE OF BETWEEN 10 TO 120 SECONDS'' DURATION WHEREIN THE FORWARD CURRENT PERIOD IS AT LEAST TWICE AS LONG AS THE REVERSE CURRENT PERIOD.
Claim 2
Dependent Claim
118 words
THE PROCESS FOR ELECTROPLATING COPPER WHICH COMPRISES ELECTRODEPOSITING COPPER FROM AN AQUEOUS COPPER CYANIDE SOLUTION CONTAINING FREE CYANIDE SELECTED FROM THE GROUP CONSISTING OF SODIUM CYANIDE AND POTASSIUM CYANIDE, SAID SOLUTION CONTAINING BETWEEN 0.025 TO 0.5 GRAMS PER LITER OF AN ALKALI METAL SALT OF METHYLENE-BISA-NAPHTHALENE SULFONIC ACID AND BETWEEN ABOUT 10 AND 250 P.P.M. BY WEIGHT OF SELENIUM AS A COMPOUND SELECTED FROM THE GROUP CONSISTING OF SELENATES AND SELENITES, AND ADDITIONALLY BETWEEN ABOUT 0.01 TO 0.1 P.P.M. BY WEIGHT OF SELENIUM AS A SELENIDE COMPOUND, SUBJECTING SAID SOLUTION TO A REVERSE CURRENT CYCLE OF BETWEEN 10 TO 120 SECONDS'' DURATION WHEREIN THE FORWARD CURRENT PERIOD IS AT LEAST TWICE AS LONG AS THE REVERSE CURRENT PERIOD.
References Cited (Backward Citations)
US2732336A
Cited
US2701234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |