Patent US3755183A successfully refreshed from Google Patents.
US3755183A
Expired / Lapsed
US
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Method of preparing silicate adsorbents and drying agents and product thereof
Assignee: Sued Chemie AG
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Filing: 1971-07-08
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Granted: 1973-08-28
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Expires: 1991-07-08
Abstract
Abstract Silicate adsorbents and drying agents are prepared by forming precipitation products from aqueous alkali metal silicate solutions and solutions of salts containing di- and trivalent metals. The precipitation product is rendered alkali free and dried. The silicate product contains at least 50 percent by weight silica.
Inventors
- 👤 R Fahn
- 👤 R Amberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:58
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; C; C01; C01B; C01B33/00; C01B33/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
17 words
Process of claim 1 wherein 0.2 to 0.8 molar metal salt solutions are used for the precipitation.
Claim 2
Dependent Claim
18 words
Process of claim 1 wherein 0.6 to 1.4 molar alkali metal silicate solutions are used for the precipitation.
Claim 3
Dependent Claim
13 words
Process of claim 1 wherein the precipitation product is treated with an acid.
References Cited (Backward Citations)
US2489334A
Cited
US2650203A
Cited
US2650202A
Cited
US3573228A
Cited
US3473890A
Cited
US3491020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |