Patent US3963315A successfully refreshed from Google Patents.
US3712866A
Expired / Lapsed
US
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Method of gelling water bearing compositions containing thickeners
Assignee: CA Industries Ltd
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Filing: 1970-03-26
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Granted: 1973-01-23
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Expires: 1990-03-26
Abstract
Abstract A METHOD IS PROVIDED FOR THE VERY RAPID GELLING OF CISHYDROXYLATED POLYMERS, SUCH AS GALACTOMANNAS, IN AN AQUEOUS MEDIUM BY ADDING THERETO A SELECTED CROSSLINKING AGENT CONSISTING OF THE PRODUCT OBTAINED BY THE ADMIXTURE OF A SOLUBLE TRIVALENT ANTIMONY COMPOUND AND A SOLUBLE HEXAVALENT CHROMIUM COMPOUND IN A POLAR LIQUID COMPRISING AT LEAST 10% BY WEIGHT OF A GLYCOLIC SUBSTANCE HAVING FREE CIS-HEYDROXYL GROUPS THEREIN. THE METHOD IS PARTICULARLY USEFUL IN GELLING A THICKENED AQUEOUS EXPOSIVE SLURRY BUT IS ALSO USEFUL IN A WIDE RANGE OF COATING OR PRESERVATIVE APPLICATIONS.
Inventors
- 👤 E Falconer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:19
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |