US2966466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of attrition-resistant silica-alumina gels
Assignee: ExxonMobil Oil Corp
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Filing: 1956-04-11
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Granted: 1960-12-27
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Expires: 1976-04-11
Abstract
No abstract record available.
Inventors
- 👤 Albert B Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:42
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12; C; C01; C01F; C01F7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A METHOD FOR PREPARING A SILICA-ALUMINA GEL CHARACTERIZED BY HIGH RESISTANCE TO ATTRITION, WHICH COMPRISES DISPERSING IN A SILICA-ALUMINA SOL. CHARACTERIZED BY AN INHERENT CAPACITY TO SET TO A HYDROGEL UPON LAPSE OF A SUITABLE PERIOD OF TIME, AN AMOUNT CORRESPONDING TO BETWEEN ABOUT 5 AND ABOUT 30 PERCENT BY VOLUME OF THE DRIED GEL OF POWERED SULFUR HAVING A WEIGHT MEAN PARTICLE DIAMETER OF BETWEEN 2 AND 8 MICRONS, ALLOWING SAID SOL CONTAINING THE POWDERED SULFUR TO SET TO A HYDROGEL AND HEATING THE RESULTING HYDROGEL AT A RATE SUFFICIENTLY SLOW AS TO AVOID DISRUPTION THEREOF TO AN ELEVATED TEMPERATURE SUFFICIENT TO REMOVE THE SULFUR THEREFROM.
Claim 2
Independent Claim
107 words
A METHOD FOR PREPARING A SILICA-ALUMINA GEL CHARACTERIZED BY HIGH RESISTANCE TO ATTRITION, WHICH COMPRISES DISPERSING IN A SILICA-ALUMINA SOL. CHARACTERIZED BY AN INHERENT CAPACITY TO SET TO A HYDROGEL UPON LAPSE OF A SUITABLE PERIOD OF TIME, AN AMOUNT CORRESPONDING TO BETWEEN ABOUT 5 AND ABOUT 30 PERCENT BY VOLUME OF THE DRIED GEL OF POWERED SULFUR HAVING A WEIGHT MEAN PARTICLE DIAMETER OF BETWEEN 2 AND 8 MICRONS, ALLOWING SAID SOL CONTAINING THE POWDERED SULFUR TO SET TO A HYDROGEL AND HEATING THE RESULTING HYDROGEL AT A RATE SUFFICIENTLY SLOW AS TO AVOID DISRUPTION THEREOF TO AN ELEVATED TEMPERATURE SUFFICIENT TO REMOVE THE SULFUR THEREFROM.
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) | 1963-12-27 | 1964-06-27 | 1964-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-27 | 1968-06-27 | 1968-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-27 | 1972-06-27 | 1972-12-27 | $7700.00 | Window Closed / Lapsed |