Patent US2643231A successfully refreshed from Google Patents.
US2643231A
Expired / Lapsed
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Preparation of hydrogel beads for drying
Assignee: Sinclair Refining Co
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Filing: 1950-01-28
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Granted: 1953-06-23
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Expires: 1970-01-28
Abstract
No abstract record available.
Inventors
- 👤 Erickson Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:43
CPC Classifications
B; B01; B01J; B01J21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN THE PREPARATION OF BEAD FORM SILICA GEL BASE CRACKING CATALYST SELECTED FROM THE GROUP CONSISTING OF SILICA ALUMINA AND SILICA MAGNESIA, THE STEP OF TREATING THE BEAD FORM HYDROGEL BEFORE DRYING WITH AN AQUEOUS SOLUTION CONTAINING FROM 0.1 TO 0.5 WEIGHT PER CENT OF A SURFACE ACTIVE AGENT BASED ON TOTAL WATER CONTENT, THE SAID SURFACE ACTIVE AGENT BEING SELECTED FROM THE GROUP CONSISTING OF ALKYL ARYL SULFONATES AND SULFONATED ALKYL SUCCINATES.
Claim 2
Dependent Claim
73 words
IN THE PREPARATION OF BEAD FORM SILICA GEL BASE CRACKING CATALYST SELECTED FROM THE GROUP CONSISTING OF SILICA ALUMINA AND SILICA MAGNESIA, THE STEP OF TREATING THE BEAD FORM HYDROGEL BEFORE DRYING WITH AN AQUEOUS SOLUTION CONTAINING FROM 0.1 TO 0.5 WEIGHT PER CENT OF A SURFACE ACTIVE AGENT BASED ON TOTAL WATER CONTENT, THE SAID SURFACE ACTIVE AGENT BEING SELECTED FROM THE GROUP CONSISTING OF ALKYL ARYL SULFONATES AND SULFONATED ALKYL SUCCINATES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |