US4116770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waxy barley starch with unique self-liquefying properties
Assignee: Research Corp
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Filing: 1975-02-27
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Granted: 1978-09-26
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Expires: 1995-02-27
Abstract
Abstract Barley starch granules are prepared which have been found to have native amylase bound sufficiently tenaciously onto the starch granule, such that it is not extracted during ordinary separation of the starch from the grain, and hence has the property of being self-liquefying when the granules are heated to a temperature of from 67° to 75° C. These granules are obtained by separation from a novel variety of barley formed by cross-breeding a first barley variety characterized by a hulless gene n n on chromosome 1 and a second barley variety which is characterized by a waxy endosperm gene wx wx on chromosome 1. In one embodiment of this variety, the first variety cross-bred is characterized by both a short awn gene lk2 lk2 and a hulless gene n n on chromosome 1. In the most preferred embodiment, a variety now called Washonupana has been discovered which will yield the novel granules of this invention.
Inventors
- 👤 Kenneth J. Goering
- 👤 Robert Eslick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:07
CPC Classifications
C; C12; C12C; C12C7/00; C12C7/04; C12C7/053; C08; C08B; C08B30/00; C12C1/00; C12C1/18; C12C5/00; Y; Y10; Y10S; Y10S47/00; Y10S47/11
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
135 words
A method for forming a liquified starch which comprises separating starch granules from the grain of the barley variety Washonupana which has been obtained by cross-breeding a first barley variety characterized by the hullness gene n n on chromosome 1, and a second barley variety which is characterized by the waxy endosperm gene wx wx on chromosome 1, which granules, when said granules are heated to a temperature of from 67° to 75° C., are self liquefying without the introduction of any outside source of enzymes, admixing said starch granules with water to form a slurry, heating said slurry until said starch granules form a paste which is then liquefied by the enzymatic activity of the amylase contained within said granules, without the addition of any other amounts of enzyme, and recovering the liquefied starch.
Claim 2
Independent Claim
135 words
A method for forming a liquified starch which comprises separating starch granules from the grain of the barley variety Washonupana which has been obtained by cross-breeding a first barley variety characterized by the hullness gene n n on chromosome 1, and a second barley variety which is characterized by the waxy endosperm gene wx wx on chromosome 1, which granules, when said granules are heated to a temperature of from 67° to 75° C., are self liquefying without the introduction of any outside source of enzymes, admixing said starch granules with water to form a slurry, heating said slurry until said starch granules form a paste which is then liquefied by the enzymatic activity of the amylase contained within said granules, without the addition of any other amounts of enzyme, and recovering the liquefied starch.
Claim 3
Dependent Claim
27 words
The method of claim 1, wherein said first variety is characterized by the short awn gene lk2 lk2 and the hulless gene n n on chromosome 1.
Claim 4
Dependent Claim
44 words
The method of claim 1, wherein said slurry is heated to a temperature of from 65° to 75° C. to effect pasting of the starch, and is further heated to a temperature of from 75° to 92.5° C. to effect liquefication of the starch.
Claim 5
Dependent Claim
37 words
The method of claim 1, wherein said slurry is heated to a temperature of from 65° to 92.5° C. whereby pasting and liquefication of said starch occurs, to obtain a viscosity of from 0 to 20 B.U.
Claim 6
Dependent Claim
17 words
The method of claim 4, wherein said slurry is heated to a temperature of from 70°-75° C.
Claim 7
Dependent Claim
22 words
The method of claim 1, wherein up to 500% by weight of a non-self liquefying starch is admixed with said barley variety.
Claim 8
Dependent Claim
17 words
The method of claim 6, wherein from 100-500% by weight of said non-self liquefying starch is admixed.
Claim 9
Dependent Claim
17 words
The method of claim 7, wherein said non-self liquefying starch is corn starch or waxy maize starch.
Claim 10
Dependent Claim
51 words
Barley starch granules from the barley variety Washonupana which contain a sufficient amount of native α-amylase after separation from the grain so as to be characterized by being self-liquefying without the addition of further amounts of amylase, when said granules are heated to a temperature of from 67° to 75° C.
Claim 11
Dependent Claim
51 words
Barley starch granules from the barley variety Washonupana which contain a sufficient amount of native α-amylase after separation from the grain so as to be characterized by being self-liquefying without the addition of further amounts of amylase, when said granules are heated to a temperature of from 67° to 75° C.
Claim 12
Dependent Claim
54 words
The barley starch granules of claim 9, which are obtained by separation from the grain of a barley variety prepared by cross-breeding a first barley variety characterized by the hulless gene n n on chromosome 1, and a second barley variety which is characterized by the waxy endosperm gene wx wx on chromosome 1.
Claim 13
Dependent Claim
51 words
The barley starch granules of claim 9, wherein said barley variety is obtained by cross-breeding a first barley variety characterized by the short awn gene lk2 lk2 and the hulless gene n n on chromosome 1, and a second variety characterized by the waxy endosperm gene wx wx on chromosome 1.
Claim 14
Dependent Claim
57 words
Barley starch granules from the barley variety Washonupana which are obtained by separation from the grain of a barley variety having the genetic characteristics of ##EQU9## wherein said granules contain an amount of amylase which is capable of effecting self-liquefication of said granules when the granules are heated to a temperature of from 67° to 75° C.
Claim 15
Dependent Claim
57 words
Barley starch granules from the barley variety Washonupana which are obtained by separation from the grain of a barley variety having the genetic characteristics of ##EQU9## wherein said granules contain an amount of amylase which is capable of effecting self-liquefication of said granules when the granules are heated to a temperature of from 67° to 75° C.
Claim 16
Dependent Claim
12 words
A slurry of the barley starch granules of claim 9 and water.
Claim 17
Dependent Claim
15 words
The slurry of claim 13 heated to a temperature of from 65° to 92.5° C.
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) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |