US3063807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of water-insoluble solids by ion exchange
Assignee: Akzo Nobel Paints LLC
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Filing: 1960-02-23
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Granted: 1962-11-13
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Expires: 1980-02-23
Abstract
No abstract record available.
Inventors
- 👤 Lester A Kenworthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:42
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/001; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
A PROCESS FOR REMOVING ADHERING, ION EXCHANGEABLE CONTAMINANTS FROM CALCINED TITANIUM DIOXIDE WHICH CONSISTS ESSENTIALLY OF CONTACTING AN AQUEOUS SLURRY OF ACID TITANIUM DIOXIDE FIRST WITH AN ANION EXCHANGE RESIN IN THE HYDROXYL FORM, SEPARATING THE RESULTING SLURRY OF TITANIUM DIOXIDE FROM SAID ANION EXCHANGE RESIN, THEN CONTACTING SAID RESULTING SLURRY WITH A CATION EXCHANGE RESIN OF THE SULFONIC ACID TYPE IN THE HYDROGEN FORM, AND RECOVERING TITANIUM DIOXIDE REDUCED IN SAID CONTAMINANTS.
References Cited (Backward Citations)
US2892679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |