US2980508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of trivalent titanium compounds contained in solid titaniferous materials
Assignee: NL Industries Inc
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Filing: 1956-11-27
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Granted: 1961-04-18
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Expires: 1976-11-27
Abstract
No abstract record available.
Inventors
- 👤 Moklebust Olav
- 👤 Bjoeraanesset Harald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:46
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1236; C22B34/124; C22B34/125; G; G21; G21F; G21F9/00; G21F9/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
METHOD FOR RENDERING A MATERIAL CONSISTING ESSENTIALLY OF A FINELY DIVIDED TITANIUM CONCENTRATE HAVING A PARTICLE SIZE NOT IN EXCESS OF ABOUT 50 MICRONS AND CONTAINING SOLID TRIVALENT TITANIUM OXIDE AMENABLE TO DIGESTION WITH CONCENTRATED SULPHURIC ACID WHICH COMPRISES WETTING THE FINELY DIVIDED CONCENTRATE WITH WATER AND A SMALL AMOUNT OF OXIDATION ACCELERATOR WITHOUT DISSOLVING THE CONCENTRATE AND WITHOUT FORMING A SLURRY, CONTACTING THE SO WETTED CONCENTRATE, PRIOR TO DIGESTION, WITH OXYGEN CONTAINING GAS TO OXIDIZE THE TRIVALENT COMPOUNDS TO TETRAVALENT WHILE MAINTAINING THE TEMPERATURE DURING OXIDATION BELOW 100*C.
Claim 2
Dependent Claim
89 words
METHOD FOR RENDERING A MATERIAL CONSISTING ESSENTIALLY OF A FINELY DIVIDED TITANIUM CONCENTRATE HAVING A PARTICLE SIZE NOT IN EXCESS OF ABOUT 50 MICRONS AND CONTAINING SOLID TRIVALENT TITANIUM OXIDE AMENABLE TO DIGESTION WITH CONCENTRATED SULPHURIC ACID WHICH COMPRISES WETTING THE FINELY DIVIDED CONCENTRATE WITH WATER AND A SMALL AMOUNT OF OXIDATION ACCELERATOR WITHOUT DISSOLVING THE CONCENTRATE AND WITHOUT FORMING A SLURRY, CONTACTING THE SO WETTED CONCENTRATE, PRIOR TO DIGESTION, WITH OXYGEN CONTAINING GAS TO OXIDIZE THE TRIVALENT COMPOUNDS TO TETRAVALENT WHILE MAINTAINING THE TEMPERATURE DURING OXIDATION BELOW 100*C.
References Cited (Backward Citations)
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US2149370A
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US2339808A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |