US4443366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gel chromatography material
Assignee: Kureha Corp
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Filing: 1982-03-29
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Granted: 1984-04-17
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Expires: 2002-03-29
Abstract
Abstract A mixture of water-soluble substances, particularly a mixture of proteins, a mixture of enzymes or a mixture of water-soluble vitamins, is fractionated by subjecting an aqueous solution of said mixture of water-soluble substances to gel chromatography through a filter bed of a cross-linked gel copolymer of vinylpyrrolidone and a cross-linking agent having a triazine ring system of the formula (I) or (II): ##STR1## wherein R 1 , R 2 and R 3 are the same or different and each radical is selected from the group consisting of --CH 2 --CH═CH 2 , --CH 2 --C.tbd.CH and --CH 2 --C(CH) 2 , in a diluent.
Inventors
- 👤 Teruo Sakagami
- 👤 Noriyuki Arakawa
- 👤 Naohiro Murayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:54
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/281; B01J20/291; B01J20/22; C; C08; C08F; C08F226/00; C08F226/06; C08F226/10; B01J2220/00; B01J2220/50; B01J2220/54; Y; Y10; Y10S; Y10S435/00; Y10S435/814; Y10S435/815
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
127 words
A method for fractionation of a mixture of substances, comprising: subjecting said mixture of substances selected from the group consisting of a mixture of vitamins, a mixture of proteins, a mixture of enzymes and mixtures thereof to gel chromatography through a filter bed of a cross-linked copolymer of vinylpyrrolidone and a cross-linking agent obtained by copolymerization of 100 parts by weight of vinylpyrrolidone and 0.5 to 100 parts by weight of said cross-linking agent having a triazine ring system of the formula (I) or (II): ##STR6## wherein R 1 , R 2 and R 3 each are the same or different and are selected from the group consisting of --CH 2 --CH═CH 2 , --CH 2 --C.tbd.CH and --CH 2 --C(CH 3 )═CH 2 in a diluent.
Claim 2
Independent Claim
127 words
A method for fractionation of a mixture of substances, comprising: subjecting said mixture of substances selected from the group consisting of a mixture of vitamins, a mixture of proteins, a mixture of enzymes and mixtures thereof to gel chromatography through a filter bed of a cross-linked copolymer of vinylpyrrolidone and a cross-linking agent obtained by copolymerization of 100 parts by weight of vinylpyrrolidone and 0.5 to 100 parts by weight of said cross-linking agent having a triazine ring system of the formula (I) or (II): ##STR6## wherein R 1 , R 2 and R 3 each are the same or different and are selected from the group consisting of --CH 2 --CH═CH 2 , --CH 2 --C.tbd.CH and --CH 2 --C(CH 3 )═CH 2 in a diluent.
Claim 3
Independent Claim
106 words
A method for fractionation of a mixture of substances, comprising: subjecting a mixture of proteins to gel chromatography through a filter bed of a cross-linked copolymer of vinylpyrrolidone and a cross-linking agent obtained by copolymerization of 100 parts by weight of vinylpyrrolidone and 0.5 to 100 parts by weight of said cross-linking agent having a triazine ring system of the formula (I) or (II): ##STR7## wherein R 1 , R 2 and R 3 each are the same or different and are selected from the group consisting of --CH 2 --CH═CH 2 , --CH 2 --C.tbd.CH and --CH 2 --C(CH 3 )═CH 2 in a diluent.
Claim 4
Independent Claim
106 words
A method for fractionation of a mixture of substances, comprising: subjecting a mixture of proteins to gel chromatography through a filter bed of a cross-linked copolymer of vinylpyrrolidone and a cross-linking agent obtained by copolymerization of 100 parts by weight of vinylpyrrolidone and 0.5 to 100 parts by weight of said cross-linking agent having a triazine ring system of the formula (I) or (II): ##STR7## wherein R 1 , R 2 and R 3 each are the same or different and are selected from the group consisting of --CH 2 --CH═CH 2 , --CH 2 --C.tbd.CH and --CH 2 --C(CH 3 )═CH 2 in a diluent.
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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) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |