US4959150A
Expired / Lapsed
US
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Fluid treatment system having low affinity for proteinaceous materials
Assignee: Pall Corp
•
Filing: 1988-09-26
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Granted: 1990-09-25
•
Expires: 2008-09-26
Abstract
Abstract A fluid treatment system is provided having a low affinity for amide group-containing materials comprising a porous structure, fluid-contacting components, including means to retain the porous structure, and a surface-modifying polymeric material having a low affinity for amide group-containing materials, formed in situ and bonded directly to the surfaces of the porous structure and the fluid contacting components. A method of producing a fluid treatment system having a low affinity for amide group-containing materials is also provided, comprising contacting the components of a filtration system including a porous structure and fluid contacting components, the fluid contacting components including means to retain the porous structure, with a solution of a monofunctional monomer having at least one hydroxyl group, which monomer is capable of forming a polymer having a low affinity for amide group-containing materials, and exposing the components and the monomer to ionizing radiation to effect polymerization of the monomer at the surface of the components.
Inventors
- 👤 Peter J. Degen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:54
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D61/00; B01D61/14; B01D61/20; B01D67/00; B01D67/0081; B01D67/0093; B01D67/00931; B01D69/00; B01D69/02; B01D2323/00; B01D2323/38; B01D2323/385
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
55 words
A filtration system having a low affinity for amide group-containing materials, comprising: a porous structure; fluid-contacting components, including means to retain said porous structure; and a surface-modifying polymeric material having a low affinity for amide group-containing materials, formed in situ and bonded directly to the surfaces of said porous structure and said fluid contacting components.
Claim 2
Dependent Claim
55 words
A filtration system having a low affinity for amide group-containing materials, comprising: a porous structure; fluid-contacting components, including means to retain said porous structure; and a surface-modifying polymeric material having a low affinity for amide group-containing materials, formed in situ and bonded directly to the surfaces of said porous structure and said fluid contacting components.
Claim 3
Dependent Claim
19 words
The filtration system according to claim 1 wherein said surface-modifying polymeric material comprises a material rich in hydroxyl groups.
Claim 4
Dependent Claim
34 words
The filtration system according to claim 1 wherein at least one of said porous structure and said fluid-contacting components is formed from a material capable of forming radicals under the influence of ionizing radiation.
Claim 5
Dependent Claim
22 words
The filtration system according to claim 1 wherein at least one of said porous structure and said fluid-contacting components comprises a polyamide.
Claim 6
Dependent Claim
13 words
The filtration system according to claim 4 wherein said polyamide is nylon 66.
Claim 7
Dependent Claim
24 words
The filtration system according to claim 1 wherein said surface-modifying polymeric material is derived from a monofunctional monomer having at least one hydroxyl group.
Claim 8
Dependent Claim
15 words
The filtration system according to claim 6 wherein said monomer comprises an ethylenically unsaturated compound.
Claim 9
Dependent Claim
15 words
The filtration system according to claim 1 wherein said amide group-containing material comprises proteinaceous material.
Claim 10
Dependent Claim
17 words
The filtration system according to claim 1 wherein said amide group-containing material comprises a peptide group-containing material.
Claim 11
Dependent Claim
15 words
The filtration system according to claim 6 wherein said monomer is a hydroxyalkyl-acrylate or methacrylate.
Claim 12
Dependent Claim
36 words
The filtration system according to claim 6 wherein said monomer is 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxyprop-1-yl acrylate, 1-hydroxyprop-2-yl acrylate, 3-hydroxypropyl acrylate, 2-hydroxyprop-1-yl methacrylate, 1-hydroxyprop-2-yl methacrylate, 3-hydroxypropyl methacrylate, or mixtures of two or more of the foregoing.
Claim 13
Dependent Claim
18 words
The filtration system according to claim 6 wherein said monomer is 2-hydroxyprop-1-yl acrylate, 1-hydroxyprop-2-yl acrylate or mixtures thereof.
Claim 14
Dependent Claim
41 words
The filtration system according to claim 1 wherein said fluid contacting components include at least one of a porous structure support material, a porous structure drainage material, an endcap, an outer cage, a central core, adaptors, tubing, fittings, and a housing.
Claim 15
Dependent Claim
15 words
The filtration system according to claim 1 wherein said porous structure is a filter member.
Claim 16
Dependent Claim
63 words
A filter assembly having a low affinity for amide group-containing materials, comprising: (a) a housing formed from a polysulfone, polyester, polyolefin, polyvinylidene difluoride, or a polyamide; (b) a disposable filter cartridge; (c) fluid-contacting fittings; and (d) a surface-modifying polymeric material having a low affinity for amide group-containing materials, formed in situ and bonded directly to the surfaces of components (a), (b), and (c).
Claim 17
Dependent Claim
63 words
A filter assembly having a low affinity for amide group-containing materials, comprising: (a) a housing formed from a polysulfone, polyester, polyolefin, polyvinylidene difluoride, or a polyamide; (b) a disposable filter cartridge; (c) fluid-contacting fittings; and (d) a surface-modifying polymeric material having a low affinity for amide group-containing materials, formed in situ and bonded directly to the surfaces of components (a), (b), and (c).
Claim 18
Independent Claim
101 words
A method of producing a filtration system having a low affinity for amide group-containing materials, comprising: contacting the components of a filtration system comprising a porous structure and fluid contacting components, said fluid contacting components including means to retain said porous structure, with a solution of a monofunctional monomer having at least one hydroxyl group, which monomer is capable of forming a polymer having a low affinity for amide group-containing materials; and exposing said components and said monomer to ionizing radiation to effect polymerization of said monomer at the surface of said components and bonding to the surface of said components.
Claim 19
Independent Claim
101 words
A method of producing a filtration system having a low affinity for amide group-containing materials, comprising: contacting the components of a filtration system comprising a porous structure and fluid contacting components, said fluid contacting components including means to retain said porous structure, with a solution of a monofunctional monomer having at least one hydroxyl group, which monomer is capable of forming a polymer having a low affinity for amide group-containing materials; and exposing said components and said monomer to ionizing radiation to effect polymerization of said monomer at the surface of said components and bonding to the surface of said components.
Claim 20
Dependent Claim
45 words
The method of producing a filtration system having a low affinity for amide group-containing materials according to claim 16 wherein at least one of said porous structure and said fluid contacting components comprises a material capable of forming radicals under the influence of ionizing radiation.
Claim 21
Dependent Claim
35 words
The method of producing a filtration system having a low affinity for amide group-containing materials according to claim 16 wherein at least one of said porous structure and said fluid contacting components comprises a polyamide.
Claim 22
Dependent Claim
35 words
The method of producing a filtration system having a low affinity for amide group-containing materials according to claim 16 wherein at least one of said porous structure and said fluid contacting components is nylon 66.
Claim 23
Dependent Claim
31 words
The method of producing a filtration system having a low affinity for amide group-containing materials according to claim 16 wherein said polymer formed from said monomer is rich in hydroxyl groups.
Claim 24
Dependent Claim
33 words
The method of producing a filtration system having a low affinity for amide group-containing materials according to claim 16 wherein said components of said filtration system are individually contacted with said monomer solution.
Claim 25
Dependent Claim
36 words
The method of producing a filtration system having a low affinity for amide group-containing materials according to claim 16 wherein said components of said filtration system are contacted with said monomer solution in an assembled state.
Claim 26
Independent Claim
97 words
A method of filtering a fluid containing a proteinaceous material with a minimal loss of the proteinaceous material, comprising: introducing a fluid containing a proteinaceous material to a filtration system having a low affinity for amide group-containing materials, which filtration system comprises (a) a porous structure, (b) fluid contacting components including means to retain said porous structure, and (c) a surface-modifying polymeric material having a low affinity for amide group-containing materials formed in situ and bonded directly to the surface of said porous structure and said fluid contacting components; and passing said fluid through said porous structure.
Claim 27
Independent Claim
97 words
A method of filtering a fluid containing a proteinaceous material with a minimal loss of the proteinaceous material, comprising: introducing a fluid containing a proteinaceous material to a filtration system having a low affinity for amide group-containing materials, which filtration system comprises (a) a porous structure, (b) fluid contacting components including means to retain said porous structure, and (c) a surface-modifying polymeric material having a low affinity for amide group-containing materials formed in situ and bonded directly to the surface of said porous structure and said fluid contacting components; and passing said fluid through said porous structure.
Claim 28
Dependent Claim
60 words
A fluid treatment system having a low affinity for amide group-containing materials, comprising: (a) a porous structure; (b) fluid contacting components, including means to retain said porous structure; and (c) a surface-modifying polymeric material having a low affinity for amide group-containing materials formed in situ and bonded directly to the surfaces of said porous structure and said fluid contacting components.
Claim 29
Dependent Claim
60 words
A fluid treatment system having a low affinity for amide group-containing materials, comprising: (a) a porous structure; (b) fluid contacting components, including means to retain said porous structure; and (c) a surface-modifying polymeric material having a low affinity for amide group-containing materials formed in situ and bonded directly to the surfaces of said porous structure and said fluid contacting components.
Claim 30
Independent Claim
28 words
The method of producing a filtration system having a low affinity for amide group-containing materials according to claims 16 wherein said monomer is a hydroxyalkyl acrylate or methacrylate.
Claim 31
Dependent Claim
48 words
The method of producing a filtration system having a low affinity for amide group-containing materials according to claim 16 wherein said monomer is 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxyprop-1-yl acrylate, 1-hydroxyprop-2-yl acrylate, 3-hydroxypropyl acrylate, 2-hydroxyprop-1-yl methacrylate, 1-hydroxyprop-2-yl methacrylate, 3-hydroxypropyl methacrylate, or mixtures of two or more of the foregoing.
Claim 32
Dependent Claim
30 words
The method of producing a filtration system having a low affinity for amide group-containing materials according to claim 16 wherein said monomer is 2-hydroxyprop-1-yl acrylate, 1-hydroxyprop-2-yl acrylate or mixtures thereof.
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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) | 1993-09-24 | 1994-03-26 | 1994-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-24 | 1998-03-26 | 1998-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-24 | 2002-03-26 | 2002-09-25 | $7700.00 | Window Closed / Lapsed |