US2657183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing a homogeneous aqueous colloidal dispersion of silica and a hydrous oxide of zinc, aluminum, tin, or columbium and the resulting product
Assignee: EIDP Inc
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Filing: 1949-08-09
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Granted: 1953-10-27
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Expires: 1969-08-09
Abstract
No abstract record available.
Inventors
- 👤 Bechtold Max Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:33
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/30; B01J13/00; B01J13/0004; B01J13/0008; B01J13/0017; C; C01; C01B; C01B33/00; C01B33/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
IN A PROCESS FOR PRODUCING AQUEOUS DISPERSIONS CONTAINING SILICIC ACID AND A HYDROUS OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC, ALUMINUM, TIN, AND COLUMBIUM, THE STEP COMPRISING EFFECTING CONTACT BETWEEN A CATIONEXCHANGE RESIN AND AN AQUEOUS SOLUTION CONTAINING AN ALKALI-METAL SILICATE TOGETHER WITH AN ALKALI-METAL SALT HAVING AN ANION SELECTED FROM THE GROUP CONSISTING OF ZINCATE, ALUMINATE, STANNATE AND COLUMBATE IONS, THE MOLE RATIO OF SILICATE, EXPRESSED AS SIO2, TO ZINCATE, ALUMINATE, STANNATE OR COLUMBATE, EXPRESSED AS THE CORRESPONDING METAL OXIDE, BEING AT LEAST 1:1.
Claim 2
Dependent Claim
89 words
IN A PROCESS FOR PRODUCING AQUEOUS DISPERSIONS CONTAINING SILICIC ACID AND A HYDROUS OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC, ALUMINUM, TIN, AND COLUMBIUM, THE STEP COMPRISING EFFECTING CONTACT BETWEEN A CATIONEXCHANGE RESIN AND AN AQUEOUS SOLUTION CONTAINING AN ALKALI-METAL SILICATE TOGETHER WITH AN ALKALI-METAL SALT HAVING AN ANION SELECTED FROM THE GROUP CONSISTING OF ZINCATE, ALUMINATE, STANNATE AND COLUMBATE IONS, THE MOLE RATIO OF SILICATE, EXPRESSED AS SIO2, TO ZINCATE, ALUMINATE, STANNATE OR COLUMBATE, EXPRESSED AS THE CORRESPONDING METAL OXIDE, BEING AT LEAST 1:1.
Claim 3
Dependent Claim
61 words
AN AQUEOUS DISPERSION, WHICH IS STABLE AGAINST GELATION FOR AT LEAST ONE DAY, THE DISPERSION COMPRISING A MOLECULARLY HOMOGENEOUS SOL CONTAINING SYNTHETIC, COLLOIDAL SILICA ASSOCIATED WITH A SYNTHETIC COLLOIDAL HYDROUS OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC, ALUMINUM, TIN, AND COLUMBIUM, THE MOLE RATIO OF SILICA, EXPRESSED AS SIO2, TO HYDROUS METAL OXIDE BEING AT LEAST 1:1,
Claim 4
Dependent Claim
61 words
AN AQUEOUS DISPERSION, WHICH IS STABLE AGAINST GELATION FOR AT LEAST ONE DAY, THE DISPERSION COMPRISING A MOLECULARLY HOMOGENEOUS SOL CONTAINING SYNTHETIC, COLLOIDAL SILICA ASSOCIATED WITH A SYNTHETIC COLLOIDAL HYDROUS OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC, ALUMINUM, TIN, AND COLUMBIUM, THE MOLE RATIO OF SILICA, EXPRESSED AS SIO2, TO HYDROUS METAL OXIDE BEING AT LEAST 1:1,
References Cited (Backward Citations)
US2438230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |