US3389064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic refining of copper and tank house electrolyte useful therein
Assignee: Canadian Copper Refiners Ltd
•
Filing: 1964-07-22
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Granted: 1968-06-18
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Expires: 1984-07-22
Abstract
No abstract record available.
Inventors
- 👤 Schloen John Henry
- 👤 Elkin Eugene Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:04
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
AN ELECTROLYTE SUITABLE FOR USE INT HE ELECTROLYTIC REFINING OF COPPER CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF SULFONIC ACID AND COPPER SULFATE AND MINOR AMOUNTS BY WEIGHT OF GLUE, THIOUREA AND A SULFONATED HYDROCARBON, SAID GLUE, SAID THIOUREA AND SAID SULFONATED AMOUNT OF ABOUT 3.0, 1.5 AND 0.9 PARTS PER MILLION BY WEIGHT, RESPECTIVELY.
Claim 2
Dependent Claim
55 words
AN ELECTROLYTE SUITABLE FOR USE INT HE ELECTROLYTIC REFINING OF COPPER CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF SULFONIC ACID AND COPPER SULFATE AND MINOR AMOUNTS BY WEIGHT OF GLUE, THIOUREA AND A SULFONATED HYDROCARBON, SAID GLUE, SAID THIOUREA AND SAID SULFONATED AMOUNT OF ABOUT 3.0, 1.5 AND 0.9 PARTS PER MILLION BY WEIGHT, RESPECTIVELY.
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) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |