US2914526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of starch esters
Assignee: Unilever Bestfoods North America
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Filing: 1956-08-02
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Granted: 1959-11-24
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Expires: 1976-08-02
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Paschall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:49
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/02; C08B31/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS OF PRODUCING LOW D.S., UNDEGRADED STARCH ESTERS OF ORGANIC ACIDS IN UNSWOLLEN GRANULE FORM WHICH COMPRISES HEATING AN INTIMATE MIXTURE OF AN ANHYDRIDE OF A MONOBASIC ORGANIC ACID AND STARCH CONTAINING ABOUT 8 TO ABOUT 20 PERCENT OF MOISTURE AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 50*C. TO ABOUT 120*C., THE PH BEING MAINTAINED ABOVE ABOUT 2.5 AND NOT EXCEEDING 5 DURING THE HEATING, AND RECOVERING THE RESULTING STARCH ESTER; THE AMOUNT OF ANHYDRIDE NOT EXCEEDING 0.4 MOLE PER MOLE OF STARCH; SAID ORGANIC ACID BEING SELECTED FROM THE GROUP CONSISTING OF ACETIC,CHOROACETIC,BYRTRIC BENZOIC ACIDS AND MIXTURES THEREOF.
Claim 2
Dependent Claim
101 words
A PROCESS OF PRODUCING LOW D.S., UNDEGRADED STARCH ESTERS OF ORGANIC ACIDS IN UNSWOLLEN GRANULE FORM WHICH COMPRISES HEATING AN INTIMATE MIXTURE OF AN ANHYDRIDE OF A MONOBASIC ORGANIC ACID AND STARCH CONTAINING ABOUT 8 TO ABOUT 20 PERCENT OF MOISTURE AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 50*C. TO ABOUT 120*C., THE PH BEING MAINTAINED ABOVE ABOUT 2.5 AND NOT EXCEEDING 5 DURING THE HEATING, AND RECOVERING THE RESULTING STARCH ESTER; THE AMOUNT OF ANHYDRIDE NOT EXCEEDING 0.4 MOLE PER MOLE OF STARCH; SAID ORGANIC ACID BEING SELECTED FROM THE GROUP CONSISTING OF ACETIC,CHOROACETIC,BYRTRIC BENZOIC ACIDS AND MIXTURES THEREOF.
References Cited (Backward Citations)
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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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |