US3078148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making titanium dioxide
Assignee: Cabot Corp
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Filing: 1961-05-26
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Granted: 1963-02-19
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Expires: 1981-05-26
Abstract
No abstract record available.
Inventors
- 👤 Louis S Bellmap
- 👤 Berstein Gregor
- 👤 Antonsen Randolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:48
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A CONTINUOUS PROCESS FOR OBTAINING A TITANIUM DIOXIDE PIGMENT ESSENTIALLY SPHERICAL IN SHAPE AND HAVING AN AVERAGE PARTICLE DIAMETER BETWEEN ABOUT 0.2 AND 0.4 MICRON WHICH COMPRISES (A) CONTINUOUSLY BURNING IN A FIRST REACTION ZONE AT TEMPERATURES ABOUT 650*F., VAPORS OF A TITANIUM HALIDE, AN OXYGEN-CONTAINING GAS, AND A HYDROGEN-CONTAINING GAS, SAID HYDROGEN-CONTAINING GAS BEING PRESENT IN AT LEAST SUFFICIENT QUANTITIES TO PROVIDE ENOUGH HYDROGEN TO REACT WITH THE MAJORITY OF SAID TITANIUM HALIDE IN ACCORDANCE WITH THE STOICHIOMETRY OF THE REACTION
Claim 2
Dependent Claim
82 words
A CONTINUOUS PROCESS FOR OBTAINING A TITANIUM DIOXIDE PIGMENT ESSENTIALLY SPHERICAL IN SHAPE AND HAVING AN AVERAGE PARTICLE DIAMETER BETWEEN ABOUT 0.2 AND 0.4 MICRON WHICH COMPRISES (A) CONTINUOUSLY BURNING IN A FIRST REACTION ZONE AT TEMPERATURES ABOUT 650*F., VAPORS OF A TITANIUM HALIDE, AN OXYGEN-CONTAINING GAS, AND A HYDROGEN-CONTAINING GAS, SAID HYDROGEN-CONTAINING GAS BEING PRESENT IN AT LEAST SUFFICIENT QUANTITIES TO PROVIDE ENOUGH HYDROGEN TO REACT WITH THE MAJORITY OF SAID TITANIUM HALIDE IN ACCORDANCE WITH THE STOICHIOMETRY OF THE REACTION
References Cited (Backward Citations)
US2823982A
Cited
US2964386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |