US4384954A
Expired / Lapsed
US
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Column for adsorption of blood proteins
Assignee: Kuraray Co Ltd
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Filing: 1981-04-03
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Granted: 1983-05-24
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Expires: 2001-04-03
Abstract
Abstract A column for adsorption of blood proteins is disclosed which comprises a blood inlet and a blood outlet each with a filter, and a porous material packed between both the filters, which material has a mean pore diameter (D) of 30-3,000 angstroms with the volume occupied by pores with diameters of 0.8 D-1.2 D being at least 80% of the whole pore volume. The adsorption column can eliminate specific blood proteins by selective adsorption and is useful in the treatment of autoimmune diseases and cancer, for instance.
Inventors
- 👤 Toshihide Nakashima
- 👤 Maso Tanihara
- 👤 Koichi Takakura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3679; B; B01; B01D; B01D15/00; B01D15/08; B01J; B01J20/00; B01J20/22; B01J20/26; B01J20/261; B01J20/264; B01J20/28; B01J20/28054; B01J20/28057; B01J20/28069; B01J20/28078; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3214; B01J20/3217; B01J20/3219; B01J20/3231; B01J20/3242; B01J20/3244; B01J20/3246; B01J20/3257; B01J20/3268; B01J20/327; B01J20/3276; B01J2220/00; B01J2220/50; B01J2220/58; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/829; Y10S530/83; Y10S530/868
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
118 words
A column for adsorption of blood proteins which comprises a blood inlet and a blood outlet each with a filter and a porous material packed between both the filters, said porous material comprising porous glass having a polymeric coating thereon, said coating applied as a solution of a hydrophilic polymer in a solvent therefor, wherein the concentration of the hydrophilic polymer in the solution ranges from about 0.05 to 2% by weight based on the solution, said porous material having a mean pore diameter of 30-3,000 angstroms with the ratio of the volume occupied by pores with diameters within the range of 0.8D-1.2D to the whole pore volume being at least 80%, D being the mean pore diameter.
Claim 2
Dependent Claim
118 words
A column for adsorption of blood proteins which comprises a blood inlet and a blood outlet each with a filter and a porous material packed between both the filters, said porous material comprising porous glass having a polymeric coating thereon, said coating applied as a solution of a hydrophilic polymer in a solvent therefor, wherein the concentration of the hydrophilic polymer in the solution ranges from about 0.05 to 2% by weight based on the solution, said porous material having a mean pore diameter of 30-3,000 angstroms with the ratio of the volume occupied by pores with diameters within the range of 0.8D-1.2D to the whole pore volume being at least 80%, D being the mean pore diameter.
Claim 3
Dependent Claim
34 words
The adsorption column of claim 1, wherein the mean pore diameter of the porous material is within the range of 30-150 angstroms so that proteins having molecular weights of 500-20,000 can be adsorbed thereon.
Claim 4
Dependent Claim
34 words
The adsorption column of claim 1, wherein the mean pore diameter of the porous material is within the range of 150-1,000 angstroms so that proteins having molecular weights of 20,000-200,000 can be adsorbed thereon.
Claim 5
Dependent Claim
34 words
The adsorption column of claim 1, wherein the mean pore diameter of the porous material is within the range of 1,000-3,000 angstroms so that proteins having molecular weights of 200,000-1,000,000 can be adsorbed thereon.
Claim 6
Dependent Claim
29 words
The adsorption column of claim 1, wherein the mean pore diameter of the porous material is within the range of 350-900 angstroms so that γ-globulin can be adsorbed thereon.
Claim 7
Dependent Claim
26 words
The adsorption column of any one of claims 1 to 5, wherein the specific pore volume of the porous material is not less than 0.5 cc/g.
Claim 8
Dependent Claim
27 words
The adsorption column of any one of claims 1 to 5, wherein the specific pore volume of the porous material is within the range of 0.5-2 cc/g.
Claim 9
Dependent Claim
22 words
The adsorption column of any one of claims 1 to 5, wherein the filters are each made of a polyester or cellulose.
Claim 10
Dependent Claim
19 words
The adsorption column of any one of claims 1 to 5, wherein the filters are each of 50-200 mesh.
Claim 11
Dependent Claim
21 words
The adsorption column of any one of claims 1 to 5, wherein the surface of the porous material is negatively charged.
Claim 12
Dependent Claim
24 words
The adsorption column of any one of claims 1 to 5, wherein the porous material carries carboxyl or sulfo groups on the surface thereof.
Claim 13
Dependent Claim
43 words
The adsorption column of claim 1, wherein the hydrophilic polymer is selected from the group consisting of polymers based on acrylic acid esters, polymers based on methacrylic acid esters, polymers based on acrylamide, polymers based on vinyl alcohol, polyvinylpyrrolidone, cellulose nitrate and gelatin.
Claim 14
Dependent Claim
21 words
The adsorption column of claim 1, wherein the hydrophilic polymer is a polymer based on an acrylic or methacrylic acid ester.
Claim 15
Dependent Claim
26 words
The adsorption column of claim 1, wherein the hydrophilic polymer is an acrylic or methacrylic acid-based polymer in which an epoxy group-containing polymerizable monomer is copolymerized.
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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) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |