US4139699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water insensitive starch fibers and a process for the production thereof
Assignee: Ingredion Inc
•
Filing: 1977-10-17
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Granted: 1979-02-13
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Expires: 1997-10-17
Abstract
Abstract Water-insensitive starch fibers having an amylopectin content of about 55 to 100% by weight are prepared by extruding a colloidal starch dispersion in thread-like form into a moving coagulating bath. Water-insoluble additives may be incorporated into the starch dispersion so as to produce a fiber containing the additive in encapsulated form.
Inventors
- 👤 Henry R. Hernandez
- 👤 Donald S. Greif
- 👤 Albert N. Barna
- 👤 Douglas S. Thornton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:00
CPC Classifications
D; D01; D01F; D01F9/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
79 words
A process for the production of water-insensitive starch fibers comprising extruding a thread-like stream of a colloidal dispersion of a starch containing 55-100% by weight amylopectin at 5-40% by weight solids, into a moving coagulating bath comprising an aqueous solution of a coagulating salt selected from the group consisting of ammonium sulfate, ammonium sulfamate, monobasic ammonium phosphate, di-basic ammonium phosphate and mixtures thereof, said solution containing said coagulating salt in an amount at least sufficient to coagulate said starch.
Claim 2
Dependent Claim
79 words
A process for the production of water-insensitive starch fibers comprising extruding a thread-like stream of a colloidal dispersion of a starch containing 55-100% by weight amylopectin at 5-40% by weight solids, into a moving coagulating bath comprising an aqueous solution of a coagulating salt selected from the group consisting of ammonium sulfate, ammonium sulfamate, monobasic ammonium phosphate, di-basic ammonium phosphate and mixtures thereof, said solution containing said coagulating salt in an amount at least sufficient to coagulate said starch.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein said starch is waxy maize, corn or tapioca.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein said starch is an ether or ester starch derivative.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein said starch is a cationically derivatized starch.
Claim 6
Dependent Claim
31 words
The process of claim 1 wherein said starch is waxy maize and said coagulating salt is ammonium sulfate present in an amount of at least 35% by weight of said solution.
Claim 7
Dependent Claim
19 words
The process of claim 1 including the additional step of periodically adding to said coagulating bath an inorganic acid.
Claim 8
Dependent Claim
32 words
The process of claim 1 wherein there is additionally present in the dispersing medium of said dispersion a hydrocolloid material replacing said starch in an amount of less than 50% by weight.
Claim 9
Dependent Claim
22 words
The process of claim 1 wherein there is additionally present in the dispersion medium of said dispersion at least one water-insoluble material.
Claim 10
Dependent Claim
43 words
The process of claim 1 wherein there is additionally present in the dispersing medium of said dispersion at least one water-soluble material and wherein there is additionally present in said coagulating bath at least one compatible salt capable of precipitating said water-soluble material.
Claim 11
Dependent Claim
30 words
The process of claim 1 wherein said starch dispersion is introduced into said coagulating bath through an apparatus having at least one aperture of 10 to 500 microns in diameter.
Claim 12
Dependent Claim
19 words
The process of claim 1 wherein said coagulation bath is maintained at a temperature of 20 to 70° C.
Claim 13
Dependent Claim
22 words
The process of claim 1 wherein said starch dispersion is introduced into said coagulating bath at an angle of approximately 90° thereto.
Claim 14
Dependent Claim
21 words
The process of claim 1 wherein said starch dispersion is introduced into said coagulating bath in a direction approximately concurrent thereto.
Claim 15
Dependent Claim
10 words
The starch fiber produced by the process of claim 1.
Claim 16
Dependent Claim
15 words
The starch fiber produced by the process of claim 7 and having a starch-hyrocolloid composition.
Claim 17
Dependent Claim
17 words
The starch fiber produced by the process of claim 8 and containing encapsulated therein the water-insoluble material.
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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) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |