US4075197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Serum albumin production
Assignee: Monsanto Co
•
Filing: 1976-09-20
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Granted: 1978-02-21
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Expires: 1996-09-20
Abstract
Abstract A serum albumin fraction is prepared in high yield and purity from plasma and other albumin-containing blood protein fractions by contacting with a resinous polymeric material having a high capacity for adsorption of albumin, heating at 65°-72° C for about 1-4 hours while maintaining a pH of 5.0-5.5, and then selectively eluting the albumin from the resin-protein mixture at a pH of 3.5-4.5. The resinous polymeric materials are diloweralkylaminoloweralkyl-substituted cross-linked dextran polymers.
Inventors
- 👤 James M. Schuck
- 👤 Charles Lewis, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:44
CPC Classifications
C; C07; C07K; C07K14/00; C07K14/435; C07K14/76; C07K14/765; A; A61; A61K; A61K38/00; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/829; Y10S530/83
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
95 words
A method for the production of a serum albumin fraction in high yield and purity from admixture with other blood protein components comprising contacting the albumin-protein mixture with a resinous polymeric material selected from the group consisting of dilowerlalkylaminoloweralkyl-substituted cross-linked dextran polymers, heating at a temperature of from about 65° C to about 72° C and at a pH of from about 5.0 to about 5.5 for about one to about four hours and then adjusting the mixture to a pH of from about 3.5 to about 4.5 to selectively elute the desired albumin therefrom.
Claim 2
Independent Claim
95 words
A method for the production of a serum albumin fraction in high yield and purity from admixture with other blood protein components comprising contacting the albumin-protein mixture with a resinous polymeric material selected from the group consisting of dilowerlalkylaminoloweralkyl-substituted cross-linked dextran polymers, heating at a temperature of from about 65° C to about 72° C and at a pH of from about 5.0 to about 5.5 for about one to about four hours and then adjusting the mixture to a pH of from about 3.5 to about 4.5 to selectively elute the desired albumin therefrom.
Claim 3
Dependent Claim
29 words
The method of claim 1 in which the resinous polymeric material is used in a concentration of from about 1% to about 5% by weight of the albumin-protein mixture.
Claim 4
Dependent Claim
21 words
The method of claim 1 in which the pH during the heat treatment step is from about 5.2 to about 5.3.
Claim 5
Dependent Claim
16 words
The method of claim 1 in which the pH during the elution step is about 4.0.
Claim 6
Dependent Claim
20 words
The method of claim 1 in which the heat treatment is carried out at a temperature of about 70° C.
Claim 7
Dependent Claim
14 words
The method of claim 1 in which the albumin-protein mixture is whole blood plasma.
Claim 8
Dependent Claim
16 words
The method of claim 1 in which the albumin-protein mixture is an AHF-depleted blood plasma fraction.
Claim 9
Dependent Claim
11 words
The method of claim 1 in which the diloweralkylaminoloweralky is diethylaminoethyl.
Claim 10
Dependent Claim
22 words
The method of claim 1 in which the albumin-protein mixture is blood plasma which has been fractionated initially to remove gamma globulin.
Claim 11
Dependent Claim
45 words
The method of claim 9 in which the initial fractionation to remove gamma globulin comprises contacting the albumin-protein mixture with the resinous polymeric material at a pH of from about 5.5 to about 7.5 and separating the unadsorbed material therefrom as the gamma globulin fraction.
Claim 12
Dependent Claim
11 words
The method of claim 10 in which the diloweralkylaminoloweralkyl is diethylaminoethyl.
Claim 13
Dependent Claim
19 words
The method of claim 10 in which the initial fractionation is carried out at a pH of about 6.0.
Claim 14
Dependent Claim
33 words
The method of claim 9 including the additional step of removing alpha and beta globulins comprising adjusting the resin-adsorbed albumin-protein mixture to a pH of about 4.7 and separating the desorbed supernatant therefrom.
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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) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |