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US3060170A
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US
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Process for increasing the viscosity of phosphate-modified starches
Assignee: International Minerals and Chemical Corp
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Filing: 1960-10-03
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Granted: 1962-10-23
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Expires: 1980-10-03
Abstract
No abstract record available.
Inventors
- 👤 Jacob W Sictsema
- 👤 Linda K Mandell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:02
CPC Classifications
C; C08; C08B; C08B30/00; C08B30/12; C08B30/14; C08B31/00; C08B31/02; C08B31/06; C08B31/066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
AN IMPROVED PROCESS FOR INCREASING THE VISCOSITY OF A TECHNICAL GRADE ALKALI-METAL PHOSPHATE-MODIFIED STARCHCH OBTAINED BY REACTION OF STARCH WITH AN ALKALI METAL ORTHOPHOSPHATE AT A TEMPERATURE BETWEEN ABOUT 120 AND ABOUT 175*C. WHICH COMPRISES FORMING A DISPERSION CONTAINING BETWEEN ABOUT 15 AND ABOUT 35 WEIGHT PERCENT OF TECHNICAL GRADE STARCH PHOSPHATE IN AN AQUEOUS SOLUTION CON-TAINING BETWEEN ABOUT 20 AND ABOUT 45 VOLUME PERCENT OF AN INERT OXYGEN-CONTAINING WATER-MISCIBLE ORGANIC LIQUID; AGITATING THE RESULTING DISPERSISON AND TREATING THE SAME WITH CHLORINE UNTIL THE SUPERNATANT ASSUMES A GREEN COLOR; SEPARATING THE SOLIDS FROM THE LIQUID PHASE; WASHING THEE SEPARATED SOLIDS WITH SOLVENT COMPRISING AN INERT OXYGENCONTAINING WATER-MISCIBLE ORGANIC LIQUID COMMON TO THE ORIGINAL DISPERSION; AND RECOVERING AN ALKALI-METAL PHOS-PHATE-MODIFIED STARCH OF SUBSTANTIALLY INCREASED VISCOSITY.
Claim 2
Dependent Claim
124 words
AN IMPROVED PROCESS FOR INCREASING THE VISCOSITY OF A TECHNICAL GRADE ALKALI-METAL PHOSPHATE-MODIFIED STARCHCH OBTAINED BY REACTION OF STARCH WITH AN ALKALI METAL ORTHOPHOSPHATE AT A TEMPERATURE BETWEEN ABOUT 120 AND ABOUT 175*C. WHICH COMPRISES FORMING A DISPERSION CONTAINING BETWEEN ABOUT 15 AND ABOUT 35 WEIGHT PERCENT OF TECHNICAL GRADE STARCH PHOSPHATE IN AN AQUEOUS SOLUTION CON-TAINING BETWEEN ABOUT 20 AND ABOUT 45 VOLUME PERCENT OF AN INERT OXYGEN-CONTAINING WATER-MISCIBLE ORGANIC LIQUID; AGITATING THE RESULTING DISPERSISON AND TREATING THE SAME WITH CHLORINE UNTIL THE SUPERNATANT ASSUMES A GREEN COLOR; SEPARATING THE SOLIDS FROM THE LIQUID PHASE; WASHING THEE SEPARATED SOLIDS WITH SOLVENT COMPRISING AN INERT OXYGENCONTAINING WATER-MISCIBLE ORGANIC LIQUID COMMON TO THE ORIGINAL DISPERSION; AND RECOVERING AN ALKALI-METAL PHOS-PHATE-MODIFIED STARCH OF SUBSTANTIALLY INCREASED VISCOSITY.
References Cited (Backward Citations)
US2562883A
Cited
US2971954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |