US3878196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for modifying starch to obtain a thixotropic starch
Assignee: Hubinger Co
•
Filing: 1973-11-21
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Granted: 1975-04-15
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Expires: 1993-11-21
Abstract
Abstract Thixotropic starch is produced by reacting a starch in the form of solid particles with a small amount of an aldehyde and carrying out the reaction at a predetermined pH under temperature conditions and for a period of time such that a thioxtropic starch is formed without reacting all of the aldehyde with the starch. The resultant product is then washed with water sufficiently to remove the unreacted aldehyde and recovered in any suitable manner, for example, by filtering and drying. By using an aldehyde such as acrolein products are obtained which are especially useful in making pies and other food products.
Inventors
- 👤 Glen C Glasscock
- 👤 Joseph E Boyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:06
CPC Classifications
C; C08; C08B; C08B35/00; A; A23; A23L; A23L29/00; A23L29/20; A23L29/206; A23L29/212; A23L29/219; C08B31/00; C08B33/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
104 words
A PROCESS OF PRODUCING A THIXOTROPIC STARCH WHICH COMPRISES REACTING A STARCH IN THE FORM OF SOLID PARTICLES WITH 0.01 TO 10.0% BY WEIGHT OF AN ALDEHYDE, CARRYING OUT SAID REACTION AT A PREDETERMINED PH WITHIN THE RANGE OF 0.1 TO 9.9 AT A TEMPERATURE WITHIN THE RANGE OF 30*F. FOR 1 MINUTE TO 40 HOURS WHILE MAINTAINING AN EXCESS OF SAID ALDEHYDE, WASHING THE RESULTANT PRODUCT WITH WATER SUFFICIENTLY TO REMOVE THE EXCESS ALDEHYDE, THE TEMPERATURE AND TIME OF HEATING BEING SUCH THAT A THIXOTROPIC STARCH IS OBTAINED AFTER REMOVAL OF EXCESS ALDEHYDE BY WASHING WITH WATER, AND RECOVERING THE SOLID THIXOTROPIC STARCH.
Claim 2
Dependent Claim
104 words
A PROCESS OF PRODUCING A THIXOTROPIC STARCH WHICH COMPRISES REACTING A STARCH IN THE FORM OF SOLID PARTICLES WITH 0.01 TO 10.0% BY WEIGHT OF AN ALDEHYDE, CARRYING OUT SAID REACTION AT A PREDETERMINED PH WITHIN THE RANGE OF 0.1 TO 9.9 AT A TEMPERATURE WITHIN THE RANGE OF 30*F. FOR 1 MINUTE TO 40 HOURS WHILE MAINTAINING AN EXCESS OF SAID ALDEHYDE, WASHING THE RESULTANT PRODUCT WITH WATER SUFFICIENTLY TO REMOVE THE EXCESS ALDEHYDE, THE TEMPERATURE AND TIME OF HEATING BEING SUCH THAT A THIXOTROPIC STARCH IS OBTAINED AFTER REMOVAL OF EXCESS ALDEHYDE BY WASHING WITH WATER, AND RECOVERING THE SOLID THIXOTROPIC STARCH.
Claim 3
Dependent Claim
33 words
A process as claimed in claim 1 in which the pH of the reaction product is adjusted to within the range of 5 to 7 in the washing and recovering of said product.
Claim 4
Dependent Claim
26 words
A process as claimed in claim 1 in which acrolein is used as the aldehyde and the amount employed is not more than 0.6% by weight.
Claim 5
Dependent Claim
22 words
A process as claimed in claim 1 in which the pH during the reaction is within the range of 7.0 to 9.9.
Claim 6
Dependent Claim
22 words
A process as claimed in claim 1 in which the pH during the reaction is within the range of 0.1 to 7.
Claim 7
Dependent Claim
22 words
A process as claimed in claim 1 in which the pH during the reaction is within the range of 1.8 to 3.
Claim 8
Dependent Claim
52 words
A process as claimed in claim 1 in which the thixotropic starch when cooked in proportions of 5.5% by weight starch in a standard acid pie cook without fruit and cooled has a Brookfield viscosity at 80*F. of approximately 14,000 to 35,000 centipoises when allowed to rest 5 minutes after being stirred.
Claim 9
Dependent Claim
12 words
A thixotropic starch resulting from the process as claimed in claim 1.
Claim 10
Dependent Claim
12 words
A thixotropic starch resulting from the process as claimed in claim 7.
References Cited (Backward Citations)
US3549618A
Cited
US3716527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |