US3573181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic reduction of iron
Assignee: Multi Minerals Ltd
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Filing: 1968-02-07
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Granted: 1971-03-30
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Expires: 1988-02-07
Abstract
Abstract THE PRESENT INVENTION IS DIRECTED TO THE REDUCTION OF MULTIVALENT CATIONS IN ACIDIC SOLUTIONS, SUCH AS PHOSPHATE SOLUTIONS, TO A LOWER OXIDATION STATE BY ELECTROLYSIS OF THE SOLUTION AND CAPTURE OF THE CATION IN SAID LOWER OXIDATION STATE BY AN ION EXCHANGE RESIN.
Inventors
- 👤 Linden W Cochran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:38
CPC Classifications
B; B01; B01J; B01J47/00; B01J47/02; B01J47/06; B01J47/08; C; C01; C01B; C01B25/00; C01B25/16; C01B25/18; C01B25/234; C01B25/237; C01B25/238
Claims Analysis
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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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |