US3883448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery and purification of protein
Assignee: Bayer Corp
•
Filing: 1973-04-23
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Granted: 1975-05-13
•
Expires: 1993-04-23
Abstract
Abstract Protein can be recovered in a purified form from cheese whey solutions by mixing a protein-containing cheese whey solution with a polycarboxylic acid, such as a polyacrylic acid, a hydrolyzed ethylene-maleic anhydride copolymer or a hydrolyzed methyl vinyl ether-maleic anhydride copolymer, to form a precipitate with the protein. The resulting precipitate is then separated from the remaining solution.
Inventors
- 👤 Moshe Sternberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:09
CPC Classifications
A; A23; A23J; A23J1/00; A23J1/20; A23J1/205; A23V; A23V2002/00; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/833
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
117 words
A PROCESS FOR ISOLATING AND PURIFYING PROTEIN FROM AQUEOUS CHEESE WHEY SOLUTIONS WHICH CONSISTS ESSENTIALLY OF MIXING THE CHEESE WHEY SOLUTION WITH ABOUT 0.1 TO ABOUT 1.0 PERCENT, (WEIGHT/VOLUME BASIS) BASED ON THE TOTAL VOLUME OF THE MIXTURE, OF A POLYCARBOXYLIC ACID SELECTED FROM THE CLASS CONSISTING OF POLYACRYLIC ACID, HYDROLYZED ETHYLENE-MALEIC ANHYDRIDE COPOLYMERS AND HYDROLYZED METHYL VINYL ETHER-MALEIC ANHYDRIDE COPOLYMERS AT A PH FROM ABOUT 3 TO ABOUT 4.5 AND AT A TEMPERATURE BELOW ABOUT 30*C. AND FOR A TIME FROM ABOUT 30 MINUTES TO ABOUT 90 MINUTES TO FORM A PRECIPITATE BETWEEN THE PROTEIN IN THE CHEESE WHEY SOLUTION AND THE POLYCARBOXYLIC ACID, AND THEN SEPARATING THE RESULTING PRECIPITATE FROM THE REMAINING CHEESE WHEY SOLUTION.
Claim 2
Dependent Claim
117 words
A PROCESS FOR ISOLATING AND PURIFYING PROTEIN FROM AQUEOUS CHEESE WHEY SOLUTIONS WHICH CONSISTS ESSENTIALLY OF MIXING THE CHEESE WHEY SOLUTION WITH ABOUT 0.1 TO ABOUT 1.0 PERCENT, (WEIGHT/VOLUME BASIS) BASED ON THE TOTAL VOLUME OF THE MIXTURE, OF A POLYCARBOXYLIC ACID SELECTED FROM THE CLASS CONSISTING OF POLYACRYLIC ACID, HYDROLYZED ETHYLENE-MALEIC ANHYDRIDE COPOLYMERS AND HYDROLYZED METHYL VINYL ETHER-MALEIC ANHYDRIDE COPOLYMERS AT A PH FROM ABOUT 3 TO ABOUT 4.5 AND AT A TEMPERATURE BELOW ABOUT 30*C. AND FOR A TIME FROM ABOUT 30 MINUTES TO ABOUT 90 MINUTES TO FORM A PRECIPITATE BETWEEN THE PROTEIN IN THE CHEESE WHEY SOLUTION AND THE POLYCARBOXYLIC ACID, AND THEN SEPARATING THE RESULTING PRECIPITATE FROM THE REMAINING CHEESE WHEY SOLUTION.
Claim 3
Dependent Claim
18 words
A process according to claim 1 wherein the pH of the cheese whey solution is 3.5 to 4.5.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |