Patent US2668776A successfully refreshed from Google Patents.
US2668776A
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Titanium dioxide pigment and method of preparing
Assignee: New Jersey Zinc Co
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Filing: 1950-03-18
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Granted: 1954-02-09
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Expires: 1970-03-18
Abstract
No abstract record available.
Inventors
- 👤 Neville F Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:39
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3607; C09C1/3653; C09C1/3661; C01; C01P; C01P2004/00; C01P2004/80; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
THE METHOD OF IMPROVING THE DRYING RATE AND STABILITY OF TITANIUM DIOXIDE PIGMENT WHICH COMPRISES SUSPENDING THE PIGMENT IN A AQUEOUS MEDIUM, EFFECTING DISPERSION OF THE PIGMENT IN SAID MEDIUM BY ADDING AN ALKALI METAL ORTHOPHOSPHATE THERETO, SUBSEQUENTLY PRECIPITATING A DISPERSION OF AN ALUMINUM ORTHOPHOSPHATE PRODUCT THROUGHOUT THE DISPERSED PIGMENT BY ADDING A WATER-SOLUBLE ALUMINUM SALT THERETO, THE AMOUNTS OF THE ALKALI METAL ORTHOPHOSPHATE AND ALUMINUM SALT ADDED TO THE PIGMENT SUSPENSION BEING SUCH AS TO PRECIPITATE THEREIN BETWEEN 1% AND 3.5% BY WEIGHT OF SAID ALUMINUM ORTHOPHOSPHATE PRODUCT IN WHICH THE MOLAR RATIO OF ALUMINA TO PHOSPHORIC PENTOXIDE IS AT LEAST 1:1, AND SEPARATING THE RESULTING ALUMINUM ORTHOPHOSPHATECONTAINING PIGMENT FROM THE AQUEOUS MEDIUM.
Claim 2
Independent Claim
114 words
THE METHOD OF IMPROVING THE DRYING RATE AND STABILITY OF TITANIUM DIOXIDE PIGMENT WHICH COMPRISES SUSPENDING THE PIGMENT IN A AQUEOUS MEDIUM, EFFECTING DISPERSION OF THE PIGMENT IN SAID MEDIUM BY ADDING AN ALKALI METAL ORTHOPHOSPHATE THERETO, SUBSEQUENTLY PRECIPITATING A DISPERSION OF AN ALUMINUM ORTHOPHOSPHATE PRODUCT THROUGHOUT THE DISPERSED PIGMENT BY ADDING A WATER-SOLUBLE ALUMINUM SALT THERETO, THE AMOUNTS OF THE ALKALI METAL ORTHOPHOSPHATE AND ALUMINUM SALT ADDED TO THE PIGMENT SUSPENSION BEING SUCH AS TO PRECIPITATE THEREIN BETWEEN 1% AND 3.5% BY WEIGHT OF SAID ALUMINUM ORTHOPHOSPHATE PRODUCT IN WHICH THE MOLAR RATIO OF ALUMINA TO PHOSPHORIC PENTOXIDE IS AT LEAST 1:1, AND SEPARATING THE RESULTING ALUMINUM ORTHOPHOSPHATECONTAINING PIGMENT FROM THE AQUEOUS MEDIUM.
References Cited (Backward Citations)
US2187050A
Cited
US2378790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |