Patent US3687928A successfully refreshed from Google Patents.
US3687928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
PROCESS OF ISOLATING NATIVE ALBUMIN AND/OR GLOBULIN FROM AN AQUEOUS SYSTEM COMPRISING RAISING THE pH TO ABOVE 8.5 AND THEN LOWERING THE pH TO THE ISOELECTRIC POINT TO PRECIPITATE PROTEIN
Assignee: Melkcentrale Gouda NV
•
Filing: 1970-04-21
•
Granted: 1972-08-29
•
Expires: 1990-04-21
Abstract
Abstract A process for isolating from an aqueous solution in their natural form proteins of the class of albumin, globulin and mixtures thereof which includes raising the pH of the aqueous protein solution to at least 8.5 and then flocculating the protein at its iso-electric point.
Inventors
- 👤 Abraham Brouwer
- 👤 Gerardus M A M Vanloom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:21
CPC Classifications
A; A23; A23C; A23C21/00; A23J; A23J1/00; A23J1/06; A23J1/20; A23J1/205; A23V; A23V2002/00; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/829; Y10S530/83; Y10S530/833
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
24 words
A process according to claim 1 wherein the initial protein solution contains a mixture of albumin and globulin 5 to 6 percent by weight.
Claim 2
Dependent Claim
14 words
A process according to claim 2 wherein the naturally occurring aqueous solution is blood.
Claim 3
Dependent Claim
14 words
A process according to claim 2 wherein the naturally occurring aqueous solution is whey.
Claim 4
Dependent Claim
30 words
A process according to claim 1, in which the precipitated albumin and globulin is redispersed to an aqueous solution, which is used as the starting material for repeating the process.
Claim 5
Dependent Claim
19 words
A process according to claim 1 wherein the pH is raised to 9.5-10.5 by the addition of basic compound.
Claim 6
Dependent Claim
14 words
A process according to claim 1 wherein the acid is added at 45* centigrade.
Claim 7
Dependent Claim
21 words
A process according to claim 1 wherein the separation of the protein is accomplished by passing the solution through a centrifuge.
References Cited (Backward Citations)
US2450810A
Cited
US2684960A
Cited
US669361A
Cited
US1428820A
Cited
US2219791A
Cited
US2391559A
Cited
US2460550A
Cited
US2923665A
Cited
US3018280A
Cited
US3476739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |