US3104971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper recovery process
Assignee: Chemetals Corp
•
Filing: 1961-02-07
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Granted: 1963-09-24
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Expires: 1981-02-07
Abstract
No abstract record available.
Inventors
- 👤 George G Olson
- 👤 Jr John T Long
- 👤 Cornelis J Heinink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:17
CPC Classifications
C; C01; C01G; C01G3/00; C22; C22B; C22B15/00; C22B15/0063; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A PROCESS FOR RECOVERING COPPER VALUES FROM A COPPER BEARING AQUEOUS SOLUTION WHICH COMPRISES CONTACTING SAID SOLUTION WITH A SUBSTANTIALLY WATER-IMMISCIBLE ORGAIC MIXTURE OF AN AMMONIUM SALT OF AN ORGANOPHOSPHORIC ACID HAVING THE FORMULA
Claim 2
Dependent Claim
34 words
A PROCESS FOR RECOVERING COPPER VALUES FROM A COPPER BEARING AQUEOUS SOLUTION WHICH COMPRISES CONTACTING SAID SOLUTION WITH A SUBSTANTIALLY WATER-IMMISCIBLE ORGAIC MIXTURE OF AN AMMONIUM SALT OF AN ORGANOPHOSPHORIC ACID HAVING THE FORMULA
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) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |