Patent US2928732A successfully refreshed from Google Patents.
US2928732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of so2 in ammonia leaching mayari ore
Assignee: Bethlehem Steel Corp
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Filing: 1957-08-20
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Granted: 1960-03-15
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Expires: 1977-08-20
Abstract
No abstract record available.
Inventors
- 👤 Conrad B Bare
- 👤 Russel J Horst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:53
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0407; C22B23/0446
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
THE METHOD OF EXTRACTING NICKEL AND COBALT FROM REDUCED OXIDIC IRON ORE CONTAINING NICKEL, COBALT AND SULFIDIC SULFUR WHICH COMPRISES TREATING SAID ORE AMMONIACAL AMMONIUM CARBONATE SOLJUTION IN THE PRESENCE OF AN OXIDIZING GAS AND SULFITE ION.
Claim 2
Independent Claim
37 words
THE METHOD OF EXTRACTING NICKEL AND COBALT FROM REDUCED OXIDIC IRON ORE CONTAINING NICKEL, COBALT AND SULFIDIC SULFUR WHICH COMPRISES TREATING SAID ORE AMMONIACAL AMMONIUM CARBONATE SOLJUTION IN THE PRESENCE OF AN OXIDIZING GAS AND SULFITE ION.
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) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |