US4623628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binder for low density lipoproteins
Assignee: ORGAON TEKNIKA BV
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Filing: 1985-06-26
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Granted: 1986-11-18
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Expires: 2005-06-26
Abstract
Abstract A binder for low density lipoproteins (LDL) consisting of sulphated polyvinyl alcohol which is cross-linked by the chemical or the physical route to a waterinsoluble product. The binder may be in the form of a hydrogel which is applied or not to a carrier or it may be present on the surface of a polyvinyl alcohol fibre which is preferably in the form of tape having a thickness of 0.1 to 2 μm and a width of 0.5 to 6 μm. The fibre shaped binder is prepared by successively cross-linking with an acidified aqueous solution of glutardialdehyde and sulphating with chlorosulphonic acid.
Inventors
- 👤 Nico Maaskant
- 👤 Adriaan Bantjes
- 👤 Hermanus J. M. Kempen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:03
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/28; A; A61; A61P; A61P3/00; A61P3/06; C08F; C08F8/00; C08F8/18; C08F8/28; C08F8/34; C08F8/36; C08F2810/00; C08F2810/20; C08J2329/00; C08J2329/02; C08J2329/04; Y; Y10; Y10T; Y10T436/00; Y10T436/10; Y10T436/104165; Y10T436/106664
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A process for the manufacture of a fiber shaped binder for low density lipoproteins (LDL), characterized in that a polyvinyl alcohol fiber is cross-linked by steeping the fiber in an acidified aqueous solution of glutardialdehyde, followed by washing with water and drying, sulphating with chlorosulphonic acid, washing to remove excess chlorosulphonic acid, steeping in an aqueous sodium hydroxide solution, and finally washing successively with water, a physiological buffer solution, and water, followed by drying, if required.
Claim 2
Dependent Claim
76 words
A process for the manufacture of a fiber shaped binder for low density lipoproteins (LDL), characterized in that a polyvinyl alcohol fiber is cross-linked by steeping the fiber in an acidified aqueous solution of glutardialdehyde, followed by washing with water and drying, sulphating with chlorosulphonic acid, washing to remove excess chlorosulphonic acid, steeping in an aqueous sodium hydroxide solution, and finally washing successively with water, a physiological buffer solution, and water, followed by drying, if required.
References Cited (Backward Citations)
US3955925A
Cited
DE3133937A1
Cited
US4474887A
Cited
FR2533704B1
Cited
US4536274A
Cited
EP0168093A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |