Patent US3000704A successfully refreshed from Google Patents.
US3000704A
Expired / Lapsed
US
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Purification of hydrous titania
Assignee: Wyeth Holdings LLC
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Filing: 1959-04-21
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Granted: 1961-09-19
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Expires: 1979-04-21
Abstract
No abstract record available.
Inventors
- 👤 Stanley Alan
- 👤 Herbert A Mckenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:21
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/0475; C01P; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS OF BENEFICIATING WASHED HYDROUS TITANIA CONTAINING ADSORBED DI- AND POLYVALENT METAL IONS INCLUDING IRON IONS WHICH COMPRISES CONTACTING SAID HYDROUS TITANIA FIRST WITH AQUEOUS ACIDIC TITANOUS SULFATE SOLUTION UNTIL SAID TITANIA HAS AN ADSORBED CONTENT OF TITANOUS TITANIUM, AND THEN CONTACTING SAID HYDROUS TITANIA WITH AN AQUEOUS SOLUTION OF AN ORGANIC SURFACE-ACTIVE AGENT UNTIL SOME OF SAID IONS ARE DESORBED FROM SAID OXIDE INTO SAID SOLUTION.
Claim 2
Dependent Claim
68 words
A PROCESS OF BENEFICIATING WASHED HYDROUS TITANIA CONTAINING ADSORBED DI- AND POLYVALENT METAL IONS INCLUDING IRON IONS WHICH COMPRISES CONTACTING SAID HYDROUS TITANIA FIRST WITH AQUEOUS ACIDIC TITANOUS SULFATE SOLUTION UNTIL SAID TITANIA HAS AN ADSORBED CONTENT OF TITANOUS TITANIUM, AND THEN CONTACTING SAID HYDROUS TITANIA WITH AN AQUEOUS SOLUTION OF AN ORGANIC SURFACE-ACTIVE AGENT UNTIL SOME OF SAID IONS ARE DESORBED FROM SAID OXIDE INTO SAID SOLUTION.
References Cited (Backward Citations)
US2592973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |