US2834739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for controlling gelation time
Assignee: ExxonMobil Oil Corp
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Filing: 1953-06-25
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Granted: 1958-05-13
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Expires: 1973-06-25
Abstract
No abstract record available.
Inventors
- 👤 Hugo G Becker
- 👤 Carl W Streed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:18
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/0052; B01J13/0056; B01J13/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN A PROCESS FOR PREPARING A SILICEOUS HYDROGEL BY INTIMATELY ADMIXING AN AQUEOUS ALKALI METAL SILICATE SOLUTION AND AN AQUEOUS ACIDIC SOLUTION UNDER CONDITIONS OF CONSTANT PH AND TEMPERATURE TO YIELD A SILICEOUS HYDROSOL WHICH INHERENTLY UNDERGOES GELATION AFTER LAPSE OF TIME TO A HYDROGEL OF UNVARYING COMPOSITION, THE IMPROVEMENT WHICH COMPRISES CONTROLLING THE GELATION TIME OF SAID HYDROGEL WITHOUT CHANGE IN THE SOLIDS CONTENT THEREOF BY INVERSELY VARYING THE CONCENTRATION OF SAID AQUEOUS ALKALI METAL SILICATE SOLUTION, WITHOUT VARIATION IN THE ALKALI METAL OXIDE TO SILICA RATIO THEREOF, AND THE CONCENTRATION OF SAID AQUEOUS ACIDIC SOLUTION BY ADJUSTING THE RELATIVE WATER CONTENTS OF THE SOLUTIONS WHILE MAINTAINING THE VOLUMETRIC RATIO OF ACIDIC SOLUTION TO ALKALI METAL SILICATE SOLUTION BETWEEN ABOUT 0.27 AND ABOUT 2.08.
Claim 2
Dependent Claim
125 words
IN A PROCESS FOR PREPARING A SILICEOUS HYDROGEL BY INTIMATELY ADMIXING AN AQUEOUS ALKALI METAL SILICATE SOLUTION AND AN AQUEOUS ACIDIC SOLUTION UNDER CONDITIONS OF CONSTANT PH AND TEMPERATURE TO YIELD A SILICEOUS HYDROSOL WHICH INHERENTLY UNDERGOES GELATION AFTER LAPSE OF TIME TO A HYDROGEL OF UNVARYING COMPOSITION, THE IMPROVEMENT WHICH COMPRISES CONTROLLING THE GELATION TIME OF SAID HYDROGEL WITHOUT CHANGE IN THE SOLIDS CONTENT THEREOF BY INVERSELY VARYING THE CONCENTRATION OF SAID AQUEOUS ALKALI METAL SILICATE SOLUTION, WITHOUT VARIATION IN THE ALKALI METAL OXIDE TO SILICA RATIO THEREOF, AND THE CONCENTRATION OF SAID AQUEOUS ACIDIC SOLUTION BY ADJUSTING THE RELATIVE WATER CONTENTS OF THE SOLUTIONS WHILE MAINTAINING THE VOLUMETRIC RATIO OF ACIDIC SOLUTION TO ALKALI METAL SILICATE SOLUTION BETWEEN ABOUT 0.27 AND ABOUT 2.08.
References Cited (Backward Citations)
US2647875A
Cited
US2528767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |