Patent US238186A successfully refreshed from Google Patents.
Patent US3044732A successfully refreshed from Google Patents.
Patent US4946944A successfully refreshed from Google Patents.
US4946944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the selective extraction of metalloproteins from whey by adsorption and elution
Assignee: Societe National Elf Aquitaine
•
Filing: 1989-08-21
•
Granted: 1990-08-07
•
Expires: 2009-08-21
Abstract
Abstract Process for the selective extraction of metalloproteins from whey, by adsorption on a porous inorganic support in the form of particles, followed by elution of the metalloproteins thus absorbed by means of solutions, characterized in that the walls of the said particles are coated with a layer of aminated polysaccharides possessing acidic functional groups at the surface.
Inventors
- 👤 Jacques Frankinet
- 👤 Andree Peyrouset
- 👤 Francois Spring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:00
CPC Classifications
A; A23; A23J; A23J1/00; A23J1/20; A23J1/205; A23C; A23C9/00; A23C9/14; A23C9/146; A23C9/1465; A23V; A23V2002/00; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/833
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
66 words
A process for the selective extraction of only metalloproteins selected from the group consisting of lactoferrin and lactoperoxydase from whey, by adsorption on a porous inorganic support in the form of solid particles, followed by elution of the metalloproteins thus adsorbed by means of solutions, wherein the walls of the said particles are coated with a layer of diethylaminoethyldextran having a carboxylic or sulphonic acid groups.
Claim 2
Dependent Claim
66 words
A process for the selective extraction of only metalloproteins selected from the group consisting of lactoferrin and lactoperoxydase from whey, by adsorption on a porous inorganic support in the form of solid particles, followed by elution of the metalloproteins thus adsorbed by means of solutions, wherein the walls of the said particles are coated with a layer of diethylaminoethyldextran having a carboxylic or sulphonic acid groups.
Claim 3
Dependent Claim
19 words
The process of claim 1, wherein the acidic groups are bound to the saccharide biopolymer via divalent hydrocarbon radicals.
Claim 4
Dependent Claim
13 words
The process of claim 2, wherein the divalent hydrocarbon radicals are alkylene groups.
Claim 5
Dependent Claim
47 words
The process of claim 1, wherein the porous inorganic particles are spherical silica particles whose: particle size is between ten and one thousand micrometers; specific surface area is between one and four hundred m 2 /g; and means pore diameter is between five and two hundred nanometers.
Claim 6
Dependent Claim
59 words
The process of claim 1 wherein the whey is first treated by passage through silica particles whose walls are coated with a layer of diethylaminothyldextran having carboxyl groups at the surface, and then the thus treated whey passes in series through silica particles whose walls are coated with another layer of diethylaminothyldextran having sulphonic acid groups at the surface.
Claim 7
Dependent Claim
12 words
The process of claim 1, wherein the whey is a sweet whey.
References Cited (Backward Citations)
FR2319399A1
Cited
US4673734A
Cited
DE2638764A1
Cited
US4100149A
Cited
US4229342A
Cited
US4308254A
Cited
FR2443867A1
Cited
US4436658A
Cited
US4667018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |