US2576483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for solubilizing titaniferous materials
Assignee: NL Industries Inc
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Filing: 1949-01-14
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Granted: 1951-11-27
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Expires: 1969-01-14
Abstract
No abstract record available.
Inventors
- 👤 Frank J Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:06
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1236; C22B34/124; C22B34/1245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
METHOD FOR PREPARING CHLORIDE SOLUTION OF TITANIUM FROM TITANIFEROUS MATERIAL WHICH COMPRISES EXTRACTING SAID MATERIAL AT TEMPERATURE SUBSTANTIALLY ABOVE 60* C. BUT NOT MORE THAN 90* C. WITH STRONG AQUEOUS HYDROCHLORIC ACID IN THE PRESENCE OF FROM 0.1% TO ABOUT 10% OF FLUORIDE IONS, CALCULATED AS HF AND BASED ON THE WEIGHT OF TIO2 IN SAID MATERIAL.
Claim 2
Dependent Claim
57 words
METHOD FOR PREPARING CHLORIDE SOLUTION OF TITANIUM FROM TITANIFEROUS MATERIAL WHICH COMPRISES EXTRACTING SAID MATERIAL AT TEMPERATURE SUBSTANTIALLY ABOVE 60* C. BUT NOT MORE THAN 90* C. WITH STRONG AQUEOUS HYDROCHLORIC ACID IN THE PRESENCE OF FROM 0.1% TO ABOUT 10% OF FLUORIDE IONS, CALCULATED AS HF AND BASED ON THE WEIGHT OF TIO2 IN SAID MATERIAL.
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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) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |