US3147077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of titanium dioxide
Assignee: British Titan Products Co Ltd
•
Filing: 1960-06-29
•
Granted: 1964-09-01
•
Expires: 1980-06-29
Abstract
No abstract record available.
Inventors
- 👤 Callow Alan Edward
- 👤 Wynne Reginald George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:55
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A METHOD OF PREPARING PIGMENTARY TITANIUM DIOXIDE WHICH COMPRISES REACTING TITANIUM TETRAHALIDE VAPOUR WITH A GASEOUS MIXTURE COMPRISING OXYGEN GAS HAVING THE FORMULA O2, AND ACTIVATED OXYGEN HAVING THE FORMULA (O).
Claim 2
Independent Claim
31 words
A METHOD OF PREPARING PIGMENTARY TITANIUM DIOXIDE WHICH COMPRISES REACTING TITANIUM TETRAHALIDE VAPOUR WITH A GASEOUS MIXTURE COMPRISING OXYGEN GAS HAVING THE FORMULA O2, AND ACTIVATED OXYGEN HAVING THE FORMULA (O).
References Cited (Backward Citations)
US2779662A
Cited
US2828187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |