US3271279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of copper from chromium-containing solution
Assignee: Honeywell International Inc
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Filing: 1962-06-18
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Granted: 1966-09-06
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Expires: 1982-06-18
Abstract
No abstract record available.
Inventors
- 👤 John G Poor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:54
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A METHOD FOR THE PLATING OUT OF COPPER FROM AN AQUEOUS SOLUTION CONTAINING AT LEAST ABOUT 20 GRAMS PER LITER OF DISSOLVED COPPER, AT LEAST ABOUT 50 GRAMS PER LITER OF DISSOLVED CHROMIUM, MEASURED AS CRO3, NO MORE THAN ABOUT 10 GRAMS PER LITER OF WHICH IS IN THE HEXAVALENT FORM AND AT LEAST ABOUT 25 GRAMS PER LITER OF FREE H2SO4, WHICH COMPRISES SUBJECTING THE SOLUTION TO A CATHODIC CURRENT AT A TEMPERATURE OF ABOUT 30 TO 75* C. WHILE AGITATING THE SOLUTION AND FORMING A COHERENT HIGH PURITY COPPER DEPOSIT, SAID PLATING OUT BEING CONTINUED UNTIL THE AQUEOUS SOLUTION CONTAINS LESS THAN ABOUT 5 GRAMS PER LITER OF COPPER, AND SAID CATHODIC CURRENT HAVING A DENSITY NO GREATER THAN ABOUT 5 AMPERES PER SQUARE FOOT WHEN THE SOLUTION CONTAINS NO MORE THAN ABOUT 5 GRAMS PER LITER OF DISSOLVED COPPER.
Claim 2
Independent Claim
142 words
A METHOD FOR THE PLATING OUT OF COPPER FROM AN AQUEOUS SOLUTION CONTAINING AT LEAST ABOUT 20 GRAMS PER LITER OF DISSOLVED COPPER, AT LEAST ABOUT 50 GRAMS PER LITER OF DISSOLVED CHROMIUM, MEASURED AS CRO3, NO MORE THAN ABOUT 10 GRAMS PER LITER OF WHICH IS IN THE HEXAVALENT FORM AND AT LEAST ABOUT 25 GRAMS PER LITER OF FREE H2SO4, WHICH COMPRISES SUBJECTING THE SOLUTION TO A CATHODIC CURRENT AT A TEMPERATURE OF ABOUT 30 TO 75* C. WHILE AGITATING THE SOLUTION AND FORMING A COHERENT HIGH PURITY COPPER DEPOSIT, SAID PLATING OUT BEING CONTINUED UNTIL THE AQUEOUS SOLUTION CONTAINS LESS THAN ABOUT 5 GRAMS PER LITER OF COPPER, AND SAID CATHODIC CURRENT HAVING A DENSITY NO GREATER THAN ABOUT 5 AMPERES PER SQUARE FOOT WHEN THE SOLUTION CONTAINS NO MORE THAN ABOUT 5 GRAMS PER LITER OF DISSOLVED COPPER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |