US4254022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protein concentrate from high-protein pearl millet
Assignee: United States Department of Agriculture
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Filing: 1980-03-21
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Granted: 1981-03-03
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Expires: 2000-03-21
Abstract
Abstract Procedures are described for obtaining about 80% of the high-grade protein in pearl millet grain as a concentrate. These procedures involve extraction of lipid-free whole millet flour with a combination of 70% aqueous isopropyl alcohol, aqueoussodium hydroxide, and dilute mineral acid to give three protein-rich fractions, which can be combined for optimum use as a protein concentrate.
Inventors
- 👤 August V. Bailey
- 👤 Gene Sumrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:14
CPC Classifications
A; A23; A23J; A23J1/00; A23J1/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
52 words
A process for obtaining a high-protein concentrate of the protein present in pearl millet grain by extraction of the defatted flour in sequence with aqueous lower (C 1 -C 4 ) alcohol (50-90%); aqueous alkali (pH 8-12); dilute aqueous mineral acid (pH 1-3); and, recovery of the protein concentrate from the extracts.
Claim 2
Dependent Claim
52 words
A process for obtaining a high-protein concentrate of the protein present in pearl millet grain by extraction of the defatted flour in sequence with aqueous lower (C 1 -C 4 ) alcohol (50-90%); aqueous alkali (pH 8-12); dilute aqueous mineral acid (pH 1-3); and, recovery of the protein concentrate from the extracts.
Claim 3
Dependent Claim
44 words
A process for obtaining a high-protein concentrate of the protein present in pearl millet grain by extraction of the defatted flour in sequence with aqueous alkali (pH 8-12); aqueous lower alcohol (C 1 -C 4 ); and then dilute aqueous mineral acid (pH 1-3).
Claim 4
Dependent Claim
44 words
A process for obtaining a high-protein concentrate of the protein present in pearl millet grain by extraction of the defatted flour in sequence with aqueous alkali (pH 8-12); aqueous lower alcohol (C 1 -C 4 ); and then dilute aqueous mineral acid (pH 1-3).
Claim 5
Dependent Claim
26 words
The process of claims 1 or 2 in which the alcohol is isopropyl alcohol, the alkali is sodium hydroxide, and the mineral acid is hydrochloric acid.
Claim 6
Dependent Claim
33 words
The process of claims 1 or 2 in which the alcohol concentration is 60-80%, the pH of the aqueous alkali is about 11, and the pH of the aqueous acid is about 2.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |