US3761245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel segregation process using metallic iron as reductant
Assignee: Stone and Webster Engineering Corp
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Filing: 1970-09-09
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Granted: 1973-09-25
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Expires: 1990-09-09
Abstract
Abstract NICKEL IS RECOVERED FROM NICKEL-CONTAINING MATERIALS BY REACTION WITH A CHLORIDE-CONTAINING MATERIAL, SUCH AS CALCIUM CHLORIDE, AND A MAGNETIC IRON-CONTAINING MATERIAL, SUCH AS SPONGE IRON.
Inventors
- 👤 S Bingham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:16
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/02; C22B23/021; C22B1/00; C22B1/02; C22B1/08; C22B23/005
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |