US2815272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing titanium concentrates
Assignee: NL Industries Inc
•
Filing: 1955-03-10
•
Granted: 1957-12-03
•
Expires: 1975-03-10
Abstract
No abstract record available.
Inventors
- 👤 David L Armant
- 👤 Harold S Sigurdson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:39
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1204; C21; C21B; C21B13/00; C21B13/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A METHOD FOR PRODUCING A DIGESTIBLE CONCENTRATE FROM TITANIFEROUS IRON ORE CONTAINING COMPOUNDS OF ALUMINUM AND SILICON WHICH COMPRISES ADMIXING SAID ORE WITH A CARBONACEOUS REDUCING AGENT AND THE ONLY FLUXING AGENT ADDED, A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AN OXIDIC COMPOUND OF SODIUM, AN OXIDIC COMPOUND OF POTASSIUM AND MIXTURES THEREOF, HEATING SAID ADMIXTURE TO FORM A SLAG AND MOLTEN IRON AT A TEMPERATURE BETWEEN 1200*C. AND 500*C. UNTIL THE FEO CONTENT OF SAID SLAG IS REDUCED TO BETWEEN 1% AND 10% THE AMOUNT OF SAID FLUXING AGENT PRESENT IN SAID MIXTURE BEING SUFFICIENT TO PRODUCE A SLAG WHICH CONTAINS FROM ABOUT 17% TO 25% (NA2O+0.LL K2O AND IN WHICH THE WEIGHT RATIO
Claim 2
Independent Claim
116 words
A METHOD FOR PRODUCING A DIGESTIBLE CONCENTRATE FROM TITANIFEROUS IRON ORE CONTAINING COMPOUNDS OF ALUMINUM AND SILICON WHICH COMPRISES ADMIXING SAID ORE WITH A CARBONACEOUS REDUCING AGENT AND THE ONLY FLUXING AGENT ADDED, A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AN OXIDIC COMPOUND OF SODIUM, AN OXIDIC COMPOUND OF POTASSIUM AND MIXTURES THEREOF, HEATING SAID ADMIXTURE TO FORM A SLAG AND MOLTEN IRON AT A TEMPERATURE BETWEEN 1200*C. AND 500*C. UNTIL THE FEO CONTENT OF SAID SLAG IS REDUCED TO BETWEEN 1% AND 10% THE AMOUNT OF SAID FLUXING AGENT PRESENT IN SAID MIXTURE BEING SUFFICIENT TO PRODUCE A SLAG WHICH CONTAINS FROM ABOUT 17% TO 25% (NA2O+0.LL K2O AND IN WHICH THE WEIGHT RATIO
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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) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |