US3969337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatographic fractionation of whey
Assignee: Roche Diagnostics GmbH
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Filing: 1974-03-27
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Granted: 1976-07-13
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Expires: 1994-03-27
Abstract
Abstract The process for the chromatographic fractionation of whey comprising passing whey through a column of an ion exchange material, thereafter passing water through said column as eluant, and collecting the aqueous effluent from said column as a plurality of fractions. Advantageously the ion exchange material is a polystyrene resin containing sulfonic acid groups neutralized with calcium ions and cross-linked with about 2 to 4% by weight of divinyl-benzene, and the eluant is demineralized water.
Inventors
- 👤 Karl Lauer
- 👤 Georg Stoeck
- 👤 Friedrich Batz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:37
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/26; A; A23; A23C; A23C9/00; A23C9/14; A23C9/146; A23C9/1465; A23C9/148; A23J; A23J1/00; A23J1/20; A23J1/205; G; G01; G01N; G01N33/00; G01N33/02; G01N33/04; A23V; A23V2002/00; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/833
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
The process for the chromatographic fractionation of dairy whey containing lactose, proteins and mineral salts into a protein fraction comprising passing said whey through a column of a cation exchange material in neutral form, said cation exchange material comprising a polystyrene resin containing sulfonic acid groups, thereafter passing an aqueous eluant consisting essentially of water through said column, and collecting a plurality of sequential aqueous effluents from said column as a plurality of separate fractions.
Claim 2
Dependent Claim
75 words
The process for the chromatographic fractionation of dairy whey containing lactose, proteins and mineral salts into a protein fraction comprising passing said whey through a column of a cation exchange material in neutral form, said cation exchange material comprising a polystyrene resin containing sulfonic acid groups, thereafter passing an aqueous eluant consisting essentially of water through said column, and collecting a plurality of sequential aqueous effluents from said column as a plurality of separate fractions.
Claim 3
Dependent Claim
19 words
The process according to claim 1, wherein the ion exchange material is a polystyrene resin containing sulfonic acid groups.
Claim 4
Dependent Claim
16 words
The process according to claim 1, wherein the cation exchange material is neutralized with calcium ions.
Claim 5
Dependent Claim
18 words
The process according to claim 1, wherein the ion exchange material used has a low degree of cross-linking.
Claim 6
Dependent Claim
23 words
The process according to claim 1, wherein the ion exchange material used has a divinyl-benzene content of about 2 to 4% by weight.
Claim 7
Dependent Claim
12 words
The process according to claim 1, wherein the eluant is demineralized water.
Claim 8
Dependent Claim
16 words
The process according to claim 1, wherein the whey is concentrated before passage through the column.
Claim 9
Dependent Claim
40 words
The process according to claim 7, wherein the ion exchange material is a polystyrene resin containing sulfonic acid groups neutralized with calcium ions and cross-linked with about 2 to 4% by weight of divinyl-benzene, and the eluant is demineralized water.
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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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |