Patent US2848303A successfully refreshed from Google Patents.
US2848303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of lower oxides of titanium
Assignee: Individual
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Filing: 1955-01-25
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Granted: 1958-08-19
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Expires: 1975-01-25
Abstract
No abstract record available.
Inventors
- 👤 Hugh S Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:45
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/043; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1236; C22B34/124; C22B34/125; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
THE METHOD OF CONVERTING RUTILE TITANIUM DIOXIDE TION A LOWER OXIDE OF TITANIUM SOLUBEL IN SULFURIC ACID, COMPRISING PREPARING AN INTIMATE MIXTURE OF RUTILE AND FINELY DIVIDED CARBON IN AN AMOUNT BETWEEN ABOUT 7 1/2% AND 15% OF THE WEIGHT OF RUTILE, AND HEATING THE MIXTURE FOR UP TO SEVERAL HOURS IN AN ATMOSPHERE CONSISTING ESSENTIALLY OF HYDROGEN AT AMBIENT PRESSURES AND AT A TEMPERATURE IN THE RANGE OF ABOUT 1300*C. TO 1600*C. UNTIL THE RUTILE IS SUBSTANTIALLY ALL REDUCED AT LEAST TO THE LOWER OXIDE, TI2O3, AND THE CARBON IS SUBSTANTIALLY ALL CONSUMED AND EVOLVED AS CO.
Claim 2
Independent Claim
98 words
THE METHOD OF CONVERTING RUTILE TITANIUM DIOXIDE TION A LOWER OXIDE OF TITANIUM SOLUBEL IN SULFURIC ACID, COMPRISING PREPARING AN INTIMATE MIXTURE OF RUTILE AND FINELY DIVIDED CARBON IN AN AMOUNT BETWEEN ABOUT 7 1/2% AND 15% OF THE WEIGHT OF RUTILE, AND HEATING THE MIXTURE FOR UP TO SEVERAL HOURS IN AN ATMOSPHERE CONSISTING ESSENTIALLY OF HYDROGEN AT AMBIENT PRESSURES AND AT A TEMPERATURE IN THE RANGE OF ABOUT 1300*C. TO 1600*C. UNTIL THE RUTILE IS SUBSTANTIALLY ALL REDUCED AT LEAST TO THE LOWER OXIDE, TI2O3, AND THE CARBON IS SUBSTANTIALLY ALL CONSUMED AND EVOLVED AS CO.
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) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |