US4053377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of copper
Assignee: United States Department of the Interior
•
Filing: 1976-02-13
•
Granted: 1977-10-11
•
Expires: 1996-02-13
Abstract
Abstract The invention consists of a method for electrowinning or electrorefining of metals, particularly copper, comprising electrodepositing the metal from an electrolyte solution under conditions comprising high cathode and anode current densities and high velocity flow of electrolyte past the electrode surfaces. Current densities of about 60 to 400 amp/sq ft are employed, with electrolyte flow rates of at least 75 ft/min, preferably about 150 to 400 ft/min.
Inventors
- 👤 David Schlain
- 👤 Frank X. McCawley
- 👤 Gerald R. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:06
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/12; C25C7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A method for electrorefining or electrowinning of copper comprising electrodepositing the copper from an electrolyte consisting essentially of an aqueous solution of copper sulfate and sulfuric acid under conditions comprising cathode and anode current densities of about 60 to 400 amp/sq. ft. and a substantially non-turbulent flow of electrolyte past the electrode surfaces at a rate of about 150 to 400 ft/min, said non-turbulent flow being achieved by means of a venturi section and a single cathode-anode pair.
Claim 2
Independent Claim
78 words
A method for electrorefining or electrowinning of copper comprising electrodepositing the copper from an electrolyte consisting essentially of an aqueous solution of copper sulfate and sulfuric acid under conditions comprising cathode and anode current densities of about 60 to 400 amp/sq. ft. and a substantially non-turbulent flow of electrolyte past the electrode surfaces at a rate of about 150 to 400 ft/min, said non-turbulent flow being achieved by means of a venturi section and a single cathode-anode pair.
References Cited (Backward Citations)
US2445675A
Cited
US2592810A
Cited
US2535966A
Cited
US3003939A
Cited
US3535222A
Cited
US3506546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |