Patent US2914486A successfully refreshed from Google Patents.
US2914486A
Expired / Lapsed
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Treatment of inorganic hydrogels
Assignee: ExxonMobil Oil Corp
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Filing: 1952-06-26
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Granted: 1959-11-24
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Expires: 1972-06-26
Abstract
No abstract record available.
Inventors
- 👤 Albert B Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:28
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/0052; B01J13/0069; B01J37/00; B01J37/08; B01J37/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A METHOD FOR PRODUCING AN INORGANIC OXIDE GEL CHARATERIZED BY A PARTICLE DENSITY OF BETWEEN ABOUT 1 AND 1.4 GRAMS PER CUBIC CENTIMETER, WHICH COMPRISES FORMING AN INORGANIC OXIDE HYDROGEL WHICH IF DRIED AND CALCINED AT ATMOSPHERIC PRESSURE, WOULD HAVE A PARTICLE DENSITY IN EXCESS OF 1.5, SUBJECTING SAID HYDROGEL, WITH OUT PRIOR SUBSTANTIAL DEHYDRATION THEREOF, TO CONTACT WITH SUPERHEATED STEAM AT A TEMPERATURE BETWEEN ABOUT 350* F. AND ABOUT 800*F. AND A PRESSURE BETWEEN 100 AND 500 POUNDS PER SQUARE INCH UNTIL SHRINKAGE OF THE HYDROGEL IS SUBSTANTIALLY COMPLETE, AND THEREAFTER CALCINING THE RESULTANT DRIED, SHUNKEN HYDROGEL AT AN ELEVATED TEMPERATURE OF AT LEAST 1025*F.
Claim 2
Independent Claim
106 words
A METHOD FOR PRODUCING AN INORGANIC OXIDE GEL CHARATERIZED BY A PARTICLE DENSITY OF BETWEEN ABOUT 1 AND 1.4 GRAMS PER CUBIC CENTIMETER, WHICH COMPRISES FORMING AN INORGANIC OXIDE HYDROGEL WHICH IF DRIED AND CALCINED AT ATMOSPHERIC PRESSURE, WOULD HAVE A PARTICLE DENSITY IN EXCESS OF 1.5, SUBJECTING SAID HYDROGEL, WITH OUT PRIOR SUBSTANTIAL DEHYDRATION THEREOF, TO CONTACT WITH SUPERHEATED STEAM AT A TEMPERATURE BETWEEN ABOUT 350* F. AND ABOUT 800*F. AND A PRESSURE BETWEEN 100 AND 500 POUNDS PER SQUARE INCH UNTIL SHRINKAGE OF THE HYDROGEL IS SUBSTANTIALLY COMPLETE, AND THEREAFTER CALCINING THE RESULTANT DRIED, SHUNKEN HYDROGEL AT AN ELEVATED TEMPERATURE OF AT LEAST 1025*F.
References Cited (Backward Citations)
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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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |