US2589964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of titanium pigments
Assignee: National Titanium Pigments Ltd
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Filing: 1947-08-11
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Granted: 1952-03-18
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Expires: 1967-08-11
Abstract
No abstract record available.
Inventors
- 👤 Richmond James Thomson
- 👤 Wigginton Raymond James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:32
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/053; C01G23/0532; C01G23/0534; C01P; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A PROCESS FOR THE MANUFACTURE OF A RUTILE TITANIUM DIOXIDE PIGMENT, WHICH COMPRISES PREPARING A NUCLEATING LIQUID CONTAINING NUCLEI OF COLLOIDAL DIMENSIONS BY DISSOLVING A TITANATE OF A METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, ZINC AND MAGNESIUM IN A MONOBASIC INORGANIC ACID TO PRODUCE A SOLUTION HAVING A PH VALUE BELOW 1.5, DILUTING THE RESULTING SOLUTION UNTIL IT HAS A TITANIUM CONTENT OF 5-80 GRAMS PER LITRE (CALCULATED AS TIO2) IF ITS TITANIUM CONTENT IS NOT ALREADY WITHIN THAT RANGE, AND HEATING THE SOLUTION AT 50-100* C. FOR A PERIOD OF 10 MINUTES TO 2 HOURS TO DEVELOP THE COLLOIDAL NUCLEI WHILE AVOIDING THE PRECIPITATION OF TITANIUM DIOXIDE FROM THE SOLUTION, AND THEREAFTER HYDROLYZING A TITANIUM SULPHATE SOLUTION IN THE PRESENCE OF THE NUCLEATING LIQUID SO OBTAINED, AND CALCINING THE RESULTING PRECIPITATE.
Claim 2
Dependent Claim
135 words
A PROCESS FOR THE MANUFACTURE OF A RUTILE TITANIUM DIOXIDE PIGMENT, WHICH COMPRISES PREPARING A NUCLEATING LIQUID CONTAINING NUCLEI OF COLLOIDAL DIMENSIONS BY DISSOLVING A TITANATE OF A METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, ZINC AND MAGNESIUM IN A MONOBASIC INORGANIC ACID TO PRODUCE A SOLUTION HAVING A PH VALUE BELOW 1.5, DILUTING THE RESULTING SOLUTION UNTIL IT HAS A TITANIUM CONTENT OF 5-80 GRAMS PER LITRE (CALCULATED AS TIO2) IF ITS TITANIUM CONTENT IS NOT ALREADY WITHIN THAT RANGE, AND HEATING THE SOLUTION AT 50-100* C. FOR A PERIOD OF 10 MINUTES TO 2 HOURS TO DEVELOP THE COLLOIDAL NUCLEI WHILE AVOIDING THE PRECIPITATION OF TITANIUM DIOXIDE FROM THE SOLUTION, AND THEREAFTER HYDROLYZING A TITANIUM SULPHATE SOLUTION IN THE PRESENCE OF THE NUCLEATING LIQUID SO OBTAINED, AND CALCINING THE RESULTING PRECIPITATE.
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) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |