US2935510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of starch derivatives
Assignee: Ingredion Inc
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Filing: 1958-06-06
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Granted: 1960-05-03
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Expires: 1978-06-06
Abstract
No abstract record available.
Inventors
- 👤 Otto B Wurzburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:46
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/02; C08B31/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A METHOD FOR MAKING A STARCH WHOSE AQUEOUS DISPERSIONS ARE CHARACTERIZED BY IMPROVED STABILITY AND RESISTANCE TO SYNERESIS WHEN EXPOSED TO PROLONGED STORAGE AT LOW TEMPERATURES, WHICH COMPRISES SUSPENDING AN UNGELATINIZED ROOT-TYPE STARCH IN WATER, ADDING TO SAID SUSPENSION A CROSS-LINKING REAGENT SELECTED FROM THE CLASS CONSISTING OF CROSS-LINKING ETHERIFICATION AND ESTERIFICATION REAGENTS TO REACT WITH HYDROXYL GROUPS OF THE STARCH AND AN ACYLATION REAGENT SELECTED FROM THE CLASS CONSISTING OF ACETIC AND PROPIONIC ACID ANHYDRIDES, AND MAINTAINING PH AND TEMPERATURE CONDITIONS SUCH AS TO AVOID GELATINIZATION OF THE STARCH DURING THE REACTION WITH SAID CROSSLINKING AND ACYLATION REAGENTS, THE AMOUNT OF CROSS-LINKING REAGENT BEING FROM 0.05% TO 1.0% AND THE AMOUNT OF THE ACYLATION REAGENT BEING FROM 4% TO 10%, BASED ON THE DRY WEIGHT OF THE STARCH, AND THE RATIO OF CROSSLINKING REAGENT TO ACYLATION REAGENT BEING WITHIN THE RANGE 1:10 TO 1:100 BY WEIGHT.
Claim 2
Independent Claim
147 words
A METHOD FOR MAKING A STARCH WHOSE AQUEOUS DISPERSIONS ARE CHARACTERIZED BY IMPROVED STABILITY AND RESISTANCE TO SYNERESIS WHEN EXPOSED TO PROLONGED STORAGE AT LOW TEMPERATURES, WHICH COMPRISES SUSPENDING AN UNGELATINIZED ROOT-TYPE STARCH IN WATER, ADDING TO SAID SUSPENSION A CROSS-LINKING REAGENT SELECTED FROM THE CLASS CONSISTING OF CROSS-LINKING ETHERIFICATION AND ESTERIFICATION REAGENTS TO REACT WITH HYDROXYL GROUPS OF THE STARCH AND AN ACYLATION REAGENT SELECTED FROM THE CLASS CONSISTING OF ACETIC AND PROPIONIC ACID ANHYDRIDES, AND MAINTAINING PH AND TEMPERATURE CONDITIONS SUCH AS TO AVOID GELATINIZATION OF THE STARCH DURING THE REACTION WITH SAID CROSSLINKING AND ACYLATION REAGENTS, THE AMOUNT OF CROSS-LINKING REAGENT BEING FROM 0.05% TO 1.0% AND THE AMOUNT OF THE ACYLATION REAGENT BEING FROM 4% TO 10%, BASED ON THE DRY WEIGHT OF THE STARCH, AND THE RATIO OF CROSSLINKING REAGENT TO ACYLATION REAGENT BEING WITHIN THE RANGE 1:10 TO 1:100 BY WEIGHT.
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) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |