US3212911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Titanium dioxide pigments
Assignee: Cabot Corp
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Filing: 1961-09-18
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Granted: 1965-10-19
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Expires: 1981-09-18
Abstract
No abstract record available.
Inventors
- 👤 Berstein Gregor
- 👤 Robert G Nuttle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:18
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3692; C09C3/00; C09C3/04; C09C3/041; C09C3/06; C09C3/063; C01; C01P; C01P2004/00; C01P2004/51; C01P2004/60; C01P2004/62; C01P2006/00; C01P2006/22; C01P2006/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS FOR RENDERING PYROGENIC TITANIUM DIOXIDE HAVING AN AVERAGE PARTICLE DIAMETER BETWEEN ABOUT 200 AND ABOUT 400 MILIMICRONS MORE READILY DISPERSIBLE IN LIQUID MEDIA COMPRISING SUBJECTING AN AQUEOUS DISPERSION OF SAID TITANIUM DIOXIDE TO MECHANICAL ATTRITION IN THE PRESENCE OF A SOLUTION OF A SUBSTANCE CHOSEN FROM THE GROUP CONSISTING OF ALKALI METAL SILICATES, ALUMINATES, TITANATES AND MIXTURES THEREOF IN AMOUNTS SUFFICIENT TO PROVIDE THE EQUIVALENT OF BETWEEN ABOUT 0.1 AND ABOUT 1% BY WEIGHT, BASED ON THE WEIGHT OF SAID PYROGENIC TITANIUM DIOXIDE, OF THE CORRESPONDING OXIDE CHOSEN FROM THE GROUP CONSISTING OF SIO2, AL2O3, TIO2 AND MIXTURES THEREOF.
Claim 2
Dependent Claim
101 words
A PROCESS FOR RENDERING PYROGENIC TITANIUM DIOXIDE HAVING AN AVERAGE PARTICLE DIAMETER BETWEEN ABOUT 200 AND ABOUT 400 MILIMICRONS MORE READILY DISPERSIBLE IN LIQUID MEDIA COMPRISING SUBJECTING AN AQUEOUS DISPERSION OF SAID TITANIUM DIOXIDE TO MECHANICAL ATTRITION IN THE PRESENCE OF A SOLUTION OF A SUBSTANCE CHOSEN FROM THE GROUP CONSISTING OF ALKALI METAL SILICATES, ALUMINATES, TITANATES AND MIXTURES THEREOF IN AMOUNTS SUFFICIENT TO PROVIDE THE EQUIVALENT OF BETWEEN ABOUT 0.1 AND ABOUT 1% BY WEIGHT, BASED ON THE WEIGHT OF SAID PYROGENIC TITANIUM DIOXIDE, OF THE CORRESPONDING OXIDE CHOSEN FROM THE GROUP CONSISTING OF SIO2, AL2O3, TIO2 AND MIXTURES THEREOF.
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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |