US3086877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of titanium dioxide pigment
Assignee: Wyeth Holdings LLC
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Filing: 1960-11-01
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Granted: 1963-04-23
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Expires: 1980-11-01
Abstract
No abstract record available.
Inventors
- 👤 Gerard M Sheehan
- 👤 Earl R Lawhorne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:43
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3607; C09C1/3653; C09C1/3661; C01; C01P; C01P2004/00; C01P2004/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN THE TREATMENT OF TITANIUM DIOXIDE PIGMENT WITH SODIUM ALUMINATE, THE IMPROVEMENTS WHICH COMPRISES FORMING AN AQUEOUS SLURRY OF TITANIUM DIOXIDE PIGMENT CONTAINING SUFFICIENT OF A STRONG ACID WHICH DISSOCIATES MORE THAN 10% AS A 1 N SOLUTION IN WATER TO IMPART TO SAID SLURRY A PH LESS THAN 4, AND ADDING THERETO AQUEOUS SODIUM ALUMINATE SOLUTION UNTIL THE PH OF SAID SLURRY IS BETWEEN 6 AND 8.
Claim 2
Dependent Claim
68 words
IN THE TREATMENT OF TITANIUM DIOXIDE PIGMENT WITH SODIUM ALUMINATE, THE IMPROVEMENTS WHICH COMPRISES FORMING AN AQUEOUS SLURRY OF TITANIUM DIOXIDE PIGMENT CONTAINING SUFFICIENT OF A STRONG ACID WHICH DISSOCIATES MORE THAN 10% AS A 1 N SOLUTION IN WATER TO IMPART TO SAID SLURRY A PH LESS THAN 4, AND ADDING THERETO AQUEOUS SODIUM ALUMINATE SOLUTION UNTIL THE PH OF SAID SLURRY IS BETWEEN 6 AND 8.
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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |