Patent US2961440A successfully refreshed from Google Patents.
US2961440A
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Process for preparing inorganic starch esters
Assignee: Unilever Bestfoods North America
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Filing: 1956-01-23
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Granted: 1960-11-22
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Expires: 1976-01-23
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Kerr
- 👤 Frank C Cleveland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:42
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/02; C08B31/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FO THE PREPARATION OF INORGANIC ORTHO ESTERS OF STARCH WHICH COMPRISES COMMINGLING UNGELATINIZED STARCH WITH AN AQUEOUS SOLUTION OF A WATER-SOLUBLE ACID SALT OF AN INORGANIC POLY BASIC OXYACID IN THE ORTHO FORM, IN SUCH PROPORTIONS THAT THE AMOUNT OF SAID SALT INCOPORATED IN SAID STARCH IS ABOUT 5 TO 11 PERCENT, BASED ON STARCH, DRY BASIS, REMOVING UNABSORBED LIQUID FROM THE TREATED STARCH BY DRYING AT A TEMPERATURE BELOW THE POINT AT WHICH THE STARCH GELATINIZES, AND HEATING THE DRIED MIXTURE OF STARCH AND SALT UNTIL THE SALT REACTS WITH THE STARCH TO FORM STARCH ORTHO ESTER.
Claim 2
Dependent Claim
100 words
A PROCESS FO THE PREPARATION OF INORGANIC ORTHO ESTERS OF STARCH WHICH COMPRISES COMMINGLING UNGELATINIZED STARCH WITH AN AQUEOUS SOLUTION OF A WATER-SOLUBLE ACID SALT OF AN INORGANIC POLY BASIC OXYACID IN THE ORTHO FORM, IN SUCH PROPORTIONS THAT THE AMOUNT OF SAID SALT INCOPORATED IN SAID STARCH IS ABOUT 5 TO 11 PERCENT, BASED ON STARCH, DRY BASIS, REMOVING UNABSORBED LIQUID FROM THE TREATED STARCH BY DRYING AT A TEMPERATURE BELOW THE POINT AT WHICH THE STARCH GELATINIZES, AND HEATING THE DRIED MIXTURE OF STARCH AND SALT UNTIL THE SALT REACTS WITH THE STARCH TO FORM STARCH ORTHO ESTER.
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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) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |