US3149985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of silica gels from alkaline silicates and polyalcohol esters
Assignee: Nobel Bozel SA
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Filing: 1962-05-08
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Granted: 1964-09-22
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Expires: 1982-05-08
Abstract
No abstract record available.
Inventors
- 👤 Gandon Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:50
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/04; C04B24/045; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/103; B22; B22C; B22C1/00; B22C1/16; B22C1/18; B22C1/186; B22C1/188; C04B28/00; C04B28/24; C04B28/26; C09; C09K; C09K17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A METHOD OF PREPARATION OF A SILICA GEL IN THE FORM OF A VERY HARD MASS SUBSTANTIALLY INSOLUBLE IN WATER COMPRISING ADDING 10-15 PARTS BY VOLUME OF A SOLUTION OF A HARDENING AGENT TO 100 PARTS BY VOLUME OF AN AQUEOUS SOLUTION OF AN ALKALINE SILICATE, SAID SOLUTION OF HARDENING AGENT COMPRISING AN AQUEOUS SOLUTION OF A POLYALCOHOL ESTER SELECTED FROM THE GROUP CONSISTING OF GLYCEROL TRIACETATE, GLYOXAL TETRA-ACETATE, PENTAERYTHRITOL TETRA-ACETATE, DIACETATE OF ETHYLENE-GLYCOL AND TRIACETATE OF TRIMETHYLOLPROPANE, DISSOLVED IN AN ADDITIONAL SOLVENT SELECTED FROM THE GROUP CONSISTING OF FORMAMIDE, DIMETHYL-FORMAMIDE AND UREA, SAID ADDITIONAL SOLVENT NOT EXCEEDING 50% BY WEIGHT OF SAID HARDENING AGENT SOLUTION, THE ALKALINE SILICATE UTILIZED HAVING A MOLECULAR RATIO SIO2:ME2O AT LEAST EQUAL TO 4, ME BEING SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM; STIRRING TO OBTAIN A HOMOGENOUS SOLUTION; AND PERMITTING THE SOLUTION TO STAND UNTIL A GEL FORMS.
Claim 2
Independent Claim
147 words
A METHOD OF PREPARATION OF A SILICA GEL IN THE FORM OF A VERY HARD MASS SUBSTANTIALLY INSOLUBLE IN WATER COMPRISING ADDING 10-15 PARTS BY VOLUME OF A SOLUTION OF A HARDENING AGENT TO 100 PARTS BY VOLUME OF AN AQUEOUS SOLUTION OF AN ALKALINE SILICATE, SAID SOLUTION OF HARDENING AGENT COMPRISING AN AQUEOUS SOLUTION OF A POLYALCOHOL ESTER SELECTED FROM THE GROUP CONSISTING OF GLYCEROL TRIACETATE, GLYOXAL TETRA-ACETATE, PENTAERYTHRITOL TETRA-ACETATE, DIACETATE OF ETHYLENE-GLYCOL AND TRIACETATE OF TRIMETHYLOLPROPANE, DISSOLVED IN AN ADDITIONAL SOLVENT SELECTED FROM THE GROUP CONSISTING OF FORMAMIDE, DIMETHYL-FORMAMIDE AND UREA, SAID ADDITIONAL SOLVENT NOT EXCEEDING 50% BY WEIGHT OF SAID HARDENING AGENT SOLUTION, THE ALKALINE SILICATE UTILIZED HAVING A MOLECULAR RATIO SIO2:ME2O AT LEAST EQUAL TO 4, ME BEING SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM; STIRRING TO OBTAIN A HOMOGENOUS SOLUTION; AND PERMITTING THE SOLUTION TO STAND UNTIL A GEL FORMS.
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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |