Patent US4828996A successfully refreshed from Google Patents.
US4828996A
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Materials and method for immobilizing biologically active substances
Assignee: Individual
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Filing: 1983-01-04
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Granted: 1989-05-09
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Expires: 2003-01-04
Abstract
Abstract Materials and a method of their preparation are described, for use in immobilizing soluble, biologically active compounds. The material for immobilizing includes a hydrophobic, water insoluble substrate having a coating of a mixture of different amphiphilic lipoid compounds thereon. The lipoid compounds are oriented so that the hydrophilic portions are distal to the substrate and free to bond with water soluble proteins and carbohydrates.
Inventors
- 👤 Rolf Siegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:02
CPC Classifications
C; C12; C12N; C12N11/00; C12N11/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
87 words
A method for preparing materials for immobilizing water soluble proteins and/or carbohydrates, which consists essentially of; providing different lipoid compounds whose molecules have a hydrophobic as well as a polar portion, dissolved or suspended in a substantially non-polar solvent or solvent mixture; bringing said solvent or solvent mixture containing said lipoid compounds into contact with the surface of a hydrophobic, water-insoluble material; and subsequently removing the solvent or solvent mixture completely whereby said compounds remain bound to the water-insoluble material through the hydrophobic portion of said molecules.
Claim 2
Independent Claim
87 words
A method for preparing materials for immobilizing water soluble proteins and/or carbohydrates, which consists essentially of; providing different lipoid compounds whose molecules have a hydrophobic as well as a polar portion, dissolved or suspended in a substantially non-polar solvent or solvent mixture; bringing said solvent or solvent mixture containing said lipoid compounds into contact with the surface of a hydrophobic, water-insoluble material; and subsequently removing the solvent or solvent mixture completely whereby said compounds remain bound to the water-insoluble material through the hydrophobic portion of said molecules.
Claim 3
Dependent Claim
76 words
A material for immobilizing biologically active water soluble proteins and/or carbohydrates, which comprises; a hydrophobic, water-insoluble, substrate having coated on its surface a plurality of different amphiphilic lipoid compound molecules, which are oriented so that the hydrophilic portion of the molecule is distal to the substrate and can establish a covalent and/or adsorptive bond with said protein or carbohydrate in an aqueous solution thereof and the hydrophobic portion of the molecule is attached to said substrate.
Claim 4
Dependent Claim
76 words
A material for immobilizing biologically active water soluble proteins and/or carbohydrates, which comprises; a hydrophobic, water-insoluble, substrate having coated on its surface a plurality of different amphiphilic lipoid compound molecules, which are oriented so that the hydrophilic portion of the molecule is distal to the substrate and can establish a covalent and/or adsorptive bond with said protein or carbohydrate in an aqueous solution thereof and the hydrophobic portion of the molecule is attached to said substrate.
References Cited (Backward Citations)
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Cited
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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) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |