US3088840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of titanium dioxide
Assignee: British Titan Products Co Ltd
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Filing: 1959-11-13
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Granted: 1963-05-07
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Expires: 1979-11-13
Abstract
No abstract record available.
Inventors
- 👤 Arkless Kenneth
- 👤 Whayman Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:39
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3692; C09C3/00; C09C3/04; C09C3/041; C09C3/06; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PROCESS OF REDUCING THE ACIDIDITY OF TITANIUM DIOXIDE PARTICLES PRODUCED BY REACTION OF TITANIUM TERTRAHALIDE VAPOR WITH OXIDIZING GAS RESULTING IN A SUSPENSION OF PARTICULATE TITANIUM DIOXIDE IN GAS FROM SAID REACTION, WHICH PARTICULATE TITANIUM DI0XIDE IS SEPARATED FROM SAID GAS SUSPENSION, WHICH COMPRISES FEEDING WATER VAPOR TO A ZONE AT 50* TO 500*C. TO CONTACT SAID SEPARATED TITANIUM DIOXIDE PARTICLES THEREIN WHILE DISTRIBUTING THROUGH THE TITANIUM DIOXIDE PARTICLES IN SAID ZONE A SMALL AMOUNT OF BORON COMPOUND IN VAPOR STATE WHICH ON INTERRACTION WITH WATER FORMS BORIC ACID, WHICH BORON COMPOUND AND WATER VAPOR ARE PROVIDED IN SAID ZONE IN AN AMOUNT SUFFICIENT TO REDUCE THE ACIDITY OF SAID TITANIUM DIOXIDE TO A PH OF AT LEAST 5.
Claim 2
Dependent Claim
120 words
A PROCESS OF REDUCING THE ACIDIDITY OF TITANIUM DIOXIDE PARTICLES PRODUCED BY REACTION OF TITANIUM TERTRAHALIDE VAPOR WITH OXIDIZING GAS RESULTING IN A SUSPENSION OF PARTICULATE TITANIUM DIOXIDE IN GAS FROM SAID REACTION, WHICH PARTICULATE TITANIUM DI0XIDE IS SEPARATED FROM SAID GAS SUSPENSION, WHICH COMPRISES FEEDING WATER VAPOR TO A ZONE AT 50* TO 500*C. TO CONTACT SAID SEPARATED TITANIUM DIOXIDE PARTICLES THEREIN WHILE DISTRIBUTING THROUGH THE TITANIUM DIOXIDE PARTICLES IN SAID ZONE A SMALL AMOUNT OF BORON COMPOUND IN VAPOR STATE WHICH ON INTERRACTION WITH WATER FORMS BORIC ACID, WHICH BORON COMPOUND AND WATER VAPOR ARE PROVIDED IN SAID ZONE IN AN AMOUNT SUFFICIENT TO REDUCE THE ACIDITY OF SAID TITANIUM DIOXIDE TO A PH OF AT LEAST 5.
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) | 1966-05-06 | 1966-11-05 | 1967-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-06 | 1970-11-05 | 1971-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-06 | 1974-11-05 | 1975-05-07 | $7700.00 | Window Closed / Lapsed |