Patent US4220723A successfully refreshed from Google Patents.
US4220723A
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US
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Enzymatic treatment of proteinaceous animal waste products
Assignee: Roehm GmbH Darmstadt
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Filing: 1978-12-19
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Granted: 1980-09-02
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Expires: 1998-12-19
Abstract
Abstract A method for converting blood, animal parts, bone waste, or meat scraps into useful products, which method comprises hydrolyzing such a substrate with a proteinase, preferably in the presence of urea, in an aqueous hydrolysis medium at a pH in a region in which the proteinase displays sufficient activity, subsequently inactivating the enzyme, and working up the hydrolyzate.
Inventors
- 👤 Zdenek Eckmayer
- 👤 Alexander Berg
- 👤 Rolf Monsheimer
- 👤 Ernst Pfleiderer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:47
CPC Classifications
A; A23; A23J; A23J3/00; A23J3/30; A23J3/32; A23J3/34; A23J3/341; A23J3/345
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
62 words
A method for converting a substrate selected from the group consisting of blood, bone waste, and meat scraps into useful water-soluble hydrolysis products dissolved in water, which method consists essentially of treating such a substrate with an hydrolysis medium consisting essentially of water, a proteinase, and urea, said medium having a pH in a region in which the proteinase displays sufficient activity.
Claim 2
Independent Claim
62 words
A method for converting a substrate selected from the group consisting of blood, bone waste, and meat scraps into useful water-soluble hydrolysis products dissolved in water, which method consists essentially of treating such a substrate with an hydrolysis medium consisting essentially of water, a proteinase, and urea, said medium having a pH in a region in which the proteinase displays sufficient activity.
Claim 3
Dependent Claim
23 words
A method as in claim 1 wherein urea is present in the hydrolysis medium at a concentration from 0.01 mole/liter to 1 mole/liter.
Claim 4
Dependent Claim
31 words
A method as in claim 1 wherein said proteinase is a pure proteinase, a proteinase-amylase mixture having sufficient amylase activity in the pH activity-range of the proteinase, or a mixture thereof.
Claim 5
Dependent Claim
35 words
A method as in claim 1 wherein said proteinase is an acid proteinase, an amylase preparation having proteolytic activity, or a mixture thereof, and said aqueous hydrolysis medium has a pH between 2 and 7.
Claim 6
Dependent Claim
13 words
A method as in claim 4 wherein said proteinase is an acid proteinase.
Claim 7
Dependent Claim
25 words
A method as in claim 1 wherein said proteinase is an alkaline proteinase and said aqueous hydrolysis medium has a pH between 8 and 13.
Claim 8
Dependent Claim
12 words
A method as in claim 1 wherein said proteinase is a subtilisin.
Claim 9
Dependent Claim
24 words
A method as in claim 1 wherein said enzyme is present in an amount between 0.1 and 5 percent by weight of the substrate.
Claim 10
Dependent Claim
41 words
A method as in claim 1 wherein said substrate is, prior to enzymatic hydrolysis, subjected to an acid or alkaline protein denaturization at a temperature of about 100° C. and is then cooled to a temperature suitable for said enzymatic hydrolysis.
Claim 11
Dependent Claim
12 words
A method as in claim 1 wherein said substrate is heavy blood.
References Cited (Backward Citations)
US4019956A
Cited
DE2709035A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-02 | 1984-03-03 | 1984-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-02 | 1988-03-03 | 1988-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-02 | 1992-03-03 | 1992-09-02 | $7700.00 | Window Closed / Lapsed |