US3832162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of copper and zinc from automobile scrap
Assignee: Individual
•
Filing: 1969-03-26
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Granted: 1974-08-27
•
Expires: 1989-03-26
Abstract
Abstract COPPER AND ZINC ARE RECOVERED FROM SCRAP DERIVED FROM AUTOMOBILES BY FIRST REMOVING THE BULK OF THE FERROUS MATERIALS, BURNING THE ORGANIC MATERIAL, SEPARATING THE BULK OF THE ZINC AS LIQUID METAL, CONTACTING THE RESIDUE WITH AQUEOUS AMMONIA TO LEACH OUT THE COPPER AND RESIDUAL ZINC, TREATING THE AMMONIACAL SOLUTION WITH A WATER IMMISICIBLE ORGANIC LIQUID CONTAINING A COPPER FROM CIFIC ION EXCHANGE REAGENT TO SEPARATE THE COPPER FROM THE ZINC, STRIPPING THE ORGANIC COPPER CONTAINING SOLUTION WITH AQUEOUS LIQUID, AND RECOVERING THE SEPARATED COPPER AND ZINC.
Inventors
- 👤 E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:28
CPC Classifications
C; C22; C22B; C22B7/00; C22B7/006; C22B7/008; C22B7/001; C22B7/004; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |