US4315038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing protein flour from brewery waste
Assignee: Molson Breweries of Canada Ltd
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Filing: 1980-08-20
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Granted: 1982-02-09
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Expires: 2000-08-20
Abstract
Abstract Trub obtained from the wort kettle of a brewing system is rich in protein and thus can be used in human foods. The trub is processed to yield a trub flour by extraction with an azeotropic mixture of isopropanol and water, and drying to remove the solvent in a roller drum drier, the latter yielding the trub flour in dry flake form.
Inventors
- 👤 Phillip M. Townsley
- 👤 Robert L. Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:01
CPC Classifications
A; A23; A23J; A23J1/00; A23J1/12; A23L; A23L33/00; A23L33/10; A23L33/17; A23L33/185
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
40 words
A process for preparing a flour for use in human food comprising the steps of extracting solid trub with an isopropanolic solvent to remove water and trub resin from the trub, and drying the trub to yield a trub flour.
Claim 2
Dependent Claim
40 words
A process for preparing a flour for use in human food comprising the steps of extracting solid trub with an isopropanolic solvent to remove water and trub resin from the trub, and drying the trub to yield a trub flour.
Claim 3
Dependent Claim
19 words
A process according to claim 1, wherein said isopropanolic solvent is an azeotropic mixture of isopropyl alcohol and water.
Claim 4
Dependent Claim
17 words
A process according to claim 2, wherein said azeotropic mixture contains 87.8% isopropyl alcohol and 12.2% water.
Claim 5
Dependent Claim
32 words
A process according to claim 1, 2 or 3, wherein the trub flour from the extraction is dried in a roller drum drier to yield a dried trub flour in flake form.
Claim 6
Dependent Claim
45 words
A process according to claim 1, 2 or 3, wherein, prior to the extraction step, wet trub from a wort kettle is subjected to whirlpool separation to yield trub and wort, and the trub is subjected to pressing to yield additional wort and solid trub.
Claim 7
Dependent Claim
20 words
A process according to claim 1, 2 or 3, wherein, following extraction, the trub resin is separated from the solvent.
References Cited (Backward Citations)
US2524718A
Cited
US2530594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |