US3924005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soluble protein
Assignee: Nestec SA
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Filing: 1973-05-21
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Granted: 1975-12-02
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Expires: 1993-05-21
Abstract
Abstract A process is described for preparing a fish protein isolate containing less than 0.5% by weight of lipids and which is watersoluble at all pH values, in which a slurry comprising comminuted fish material is subjected to enzymatic treatment until less than 20% by weight of the protein present in the fish is precipitable at a pH of 4.5, undegraded proteins are then precipitated from the slurry and insoluble matter is separated from the slurry to provide a solution of fish protein isolate.
Inventors
- 👤 Sven Ingmar Walton Bosund
- 👤 Bengt Lennart Bengtsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:29
CPC Classifications
A; A23; A23J; A23J1/00; A23J1/04; A23J3/00; A23J3/30; A23J3/32; A23J3/34; A23J3/341; A23L; A23L2/00; A23L2/52; A23L2/66
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
118 words
A PROCESS FOR PREPARING A FISH PROTEIN ISOLATE CONTAINING LESS THAN 0.5% BY WEIGHT OF LIPIDS AND WHICH IS WATER SOLUBLE AT ALL PH VALUES COMPRISING SUBJECTING AN AQUEOUS SLURRY OF COMMINUTED FISH MATERIAL TO ENZYMATIC SOLUBILIZATION UNTIL LESS THAN 20% BUT GREATER THA 0% BY WEIGHT OF THE PROTEIN OF SAID FISH MATERIAL IS PRECIPITABLE AT A PH OF 4.5, PRECIPITATING UNDEGRADED PROTEINS FROM THE SLURRY BY A STEP SELECTED FROM THE GROUP CONSISTING OF ACIDIFYING SAID SLURRY TO A PH OF 4.0 TO 5.0 AND HEATING SAID SLURRY TO A TEMPERATURE ABOVE 70*C AND SEPARATING THE PRECIPITATED INSOLUBLE MATTER COMPRISING UNDEGRADED PROTEINS, LIPO-PROTEINS AND LIPIDS FROM THE SLURRY TO PROVIDE A SOLUTION OF FISH PROTEIN ISOLATE.
Claim 2
Dependent Claim
118 words
A PROCESS FOR PREPARING A FISH PROTEIN ISOLATE CONTAINING LESS THAN 0.5% BY WEIGHT OF LIPIDS AND WHICH IS WATER SOLUBLE AT ALL PH VALUES COMPRISING SUBJECTING AN AQUEOUS SLURRY OF COMMINUTED FISH MATERIAL TO ENZYMATIC SOLUBILIZATION UNTIL LESS THAN 20% BUT GREATER THA 0% BY WEIGHT OF THE PROTEIN OF SAID FISH MATERIAL IS PRECIPITABLE AT A PH OF 4.5, PRECIPITATING UNDEGRADED PROTEINS FROM THE SLURRY BY A STEP SELECTED FROM THE GROUP CONSISTING OF ACIDIFYING SAID SLURRY TO A PH OF 4.0 TO 5.0 AND HEATING SAID SLURRY TO A TEMPERATURE ABOVE 70*C AND SEPARATING THE PRECIPITATED INSOLUBLE MATTER COMPRISING UNDEGRADED PROTEINS, LIPO-PROTEINS AND LIPIDS FROM THE SLURRY TO PROVIDE A SOLUTION OF FISH PROTEIN ISOLATE.
Claim 3
Dependent Claim
27 words
A process according to claim 1 in which the fish material comprises raw whole fish and the enzymatic treatment is effected with enzymes present in the fish.
Claim 4
Dependent Claim
20 words
A process according to claim 1 in which the enzymatic treatment is effected at a temperature of 40* to 70*C.
Claim 5
Dependent Claim
24 words
A process according to claim 1 in which the undegraded proteins are precipitated by acidifying the slurry to a pH of 4.0 to 5.0.
Claim 6
Dependent Claim
22 words
A process according to claim 1 in which the undegraded proteins are precipitated by heating the slurry to a temperature above 70*C.
Claim 7
Dependent Claim
22 words
A process according to claim 5 in which the slurry is heated at a temperature of about 90*C for about 10 minutes.
Claim 8
Dependent Claim
22 words
A process according to claim 5 in which the slurry is heated at a temperature of about 80*C for about 30 minutes.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |