Patent US3127280A successfully refreshed from Google Patents.
US3127280A
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Treatment of titanium dioxide
Assignee: —
•
Filing: —
•
Granted: 1964-03-31
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Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:30
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3607; C09C1/3653; C09C1/3661; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84; C01P2004/86
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
26 words
TITANIUM DOIXIDE PIGMENT OF IMPROVED CHALK RESISTANCE RESULTING FROM THE PRESENCE OF AT LEAST ABOUT 0.1% OF AN INSOLUBLE HYDROUS TITANIC PHOSPHATE ON THE PARTICLES THEREOF.
Claim 2
Dependent Claim
26 words
TITANIUM DOIXIDE PIGMENT OF IMPROVED CHALK RESISTANCE RESULTING FROM THE PRESENCE OF AT LEAST ABOUT 0.1% OF AN INSOLUBLE HYDROUS TITANIC PHOSPHATE ON THE PARTICLES THEREOF.
Claim 3
Dependent Claim
77 words
A PROCESS FOR THE MANUFACTURE OF TITANIUM DIOXIDE PIGMENT OF IMPROVED CHALK RESISTANCE, WHICH COMPRISES FORMING A SLURRY OF TITANIUM DIOXIDE PIGMENT IN AQUEOUS MEDIUM HAVING A DISSOLVED CONTENT OF A TITANIC SALT, ADDING AN AQUEOUS SOLUTION OF WATER-SOLUBE PHOSPHATIC COMPOUND THEREBY PRECIPITATING A SMALL AMOUNT OF A HYDROUS TITANIC PHOSPHATE SUFFICIENT TO PROVIDE A FINISHED PRODUCT CONTAINING ABOUT 0.1 TO 5% OF THE SOME, NEUTRALIZING SAID SLURRY, AND WASHING SAID PIGMENT TO REMOVE SOLUBLE SALTS THEREFROM.
Claim 4
Dependent Claim
77 words
A PROCESS FOR THE MANUFACTURE OF TITANIUM DIOXIDE PIGMENT OF IMPROVED CHALK RESISTANCE, WHICH COMPRISES FORMING A SLURRY OF TITANIUM DIOXIDE PIGMENT IN AQUEOUS MEDIUM HAVING A DISSOLVED CONTENT OF A TITANIC SALT, ADDING AN AQUEOUS SOLUTION OF WATER-SOLUBE PHOSPHATIC COMPOUND THEREBY PRECIPITATING A SMALL AMOUNT OF A HYDROUS TITANIC PHOSPHATE SUFFICIENT TO PROVIDE A FINISHED PRODUCT CONTAINING ABOUT 0.1 TO 5% OF THE SOME, NEUTRALIZING SAID SLURRY, AND WASHING SAID PIGMENT TO REMOVE SOLUBLE SALTS THEREFROM.
References Cited (Backward Citations)
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Cited
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Cited
US1953777A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |