Patent US2898305A successfully refreshed from Google Patents.
US2898305A
Expired / Lapsed
US
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Preparation of silica-based catalysts
Assignee: Sinclair Refining Co
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Filing: 1956-01-17
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Granted: 1959-08-04
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Expires: 1976-01-17
Abstract
No abstract record available.
Inventors
- 👤 John W Teter
- 👤 John L Gring
- 👤 Erickson Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:33
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN A METHOD OF CATALYST MANUFACTURING, THE STEPS WHICH COMPRISE AGITATING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF SILICA AND SILICA CONTAINING MINOR AMOUNTS OF ACIDIC COMPONENTS IN AN ESSENTIALLY AQUEOUS SLURRY MEDIUM WITH AT LEAST ONE SUBSTANTIALLY WATER-INSOLUBLE INORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE CARBONATES, OXIDES AND HYDROXIDES OF THE IRON TRANSITION GROUP METALS, MOLYBDENUM, TUNSTEN, AND VANADIUM TO DEPOSIT SAID METALS ON THE SILICA, SEPARATING SOLIDS FROM THE AQUEOUS MEDIUM, DRYING THE SEPARATED SOLIDS, AND CALCINING THE DRIED MATERIAL.
Claim 2
Dependent Claim
85 words
IN A METHOD OF CATALYST MANUFACTURING, THE STEPS WHICH COMPRISE AGITATING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF SILICA AND SILICA CONTAINING MINOR AMOUNTS OF ACIDIC COMPONENTS IN AN ESSENTIALLY AQUEOUS SLURRY MEDIUM WITH AT LEAST ONE SUBSTANTIALLY WATER-INSOLUBLE INORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE CARBONATES, OXIDES AND HYDROXIDES OF THE IRON TRANSITION GROUP METALS, MOLYBDENUM, TUNSTEN, AND VANADIUM TO DEPOSIT SAID METALS ON THE SILICA, SEPARATING SOLIDS FROM THE AQUEOUS MEDIUM, DRYING THE SEPARATED SOLIDS, AND CALCINING THE DRIED MATERIAL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |