US5106579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Membrane type artificial lung and method for manufacture thereof
Assignee: Terumo Corp
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Filing: 1990-09-27
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Granted: 1992-04-21
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Expires: 2010-09-27
Abstract
Abstract A membrane type artificial lung uses a gas-exchange membrane having at least the surface thereof for exposure to blood or the minute pores therein coated or blocked with a vinyl type copolymer having as one of the components thereof a vinyl monomer possessing a perfluoroalkyl side chain. The gas-exchange membrane of the artificial lung is manufactured by a method which comprises bringing at least the surface of the gas-exchange membrane for exposure to blood into contact with a solution of the vinyl type copolymer and subsequently vaporizing the solvent in the solution.
Inventors
- 👤 Hiromichi Fukazawa
- 👤 Kazuhiko Hagiwara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:07
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0081; B01D67/0088; A; A61; A61L; A61L33/00; A61L33/06; A61L33/064; Y; Y10; Y10S; Y10S128/00; Y10S128/03; Y10S261/00; Y10S261/28
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
38 words
A gas-exchange membrane for an artificial lung, comprising a membrane having a surface coated with a vinyl type copolymer comprising a methacrylate type copolymer comprising a methacrylate monomer possessing a perfluoroalkyl side chain which is exposed to blood.
Claim 2
Dependent Claim
38 words
A gas-exchange membrane for an artificial lung, comprising a membrane having a surface coated with a vinyl type copolymer comprising a methacrylate type copolymer comprising a methacrylate monomer possessing a perfluoroalkyl side chain which is exposed to blood.
Claim 3
Dependent Claim
20 words
A gas-exchange membrane for an artificial lung according to claim 1, wherein said vinyl type copolymer is a block copolymer.
Claim 4
Dependent Claim
49 words
A gas-exchange membrane for an artificial lung according to claim 2, wherein the weight ratio of a polymer component formed of a vinyl monomer possessing a perfluoroalkyl side chain to a polymer component formed of another monomer of said block copolymer is in the range of 0.25 to 1.5.
Claim 5
Dependent Claim
28 words
A gas-exchange membrane for an artificial lung according to claim 1, wherein said perfluoroalkyl side chain is --Ch 2 CH 2 (CF 2 ) 7 CF 3 .
Claim 6
Dependent Claim
18 words
A gas-exchange membrane for an artificial lung according to claim 1, wherein said membrane is a porous membrane.
Claim 7
Dependent Claim
22 words
A gas-exchange membrane for an artificial lung according to claim 5, wherein said porous membrane is made of an olefin type resin.
Claim 8
Dependent Claim
18 words
A gas-exchange membrane for an artificial lung according to claim 6, wherein said membrane is made of polypropylene.
Claim 9
Dependent Claim
18 words
A gas-exchange membrane for an artificial lung according to claim 1, wherein said membrane is a homogeneous membrane.
Claim 10
Dependent Claim
20 words
A gas-exchange membrane for an artificial lung according to claim 8, wherein said homogeneous membrane is made of silicone rubber.
Claim 11
Dependent Claim
19 words
A gas-exchange membrane for an artificial lung according to claim 1, wherein said membrane is a hollow fiber membrane.
Claim 12
Dependent Claim
38 words
A gas-exchange membrane for an artificial lung according to claim 1, wherein said vinyl type copolymer comprises a vinyl monomer possessing a perfluoroalkyl side chain applied in a wall thickness in the range of 0.001 to 10 μm.
Claim 13
Dependent Claim
89 words
A gas-exchange membrane for an artificial lung comprising a porous membrane having a wall thickness in the range of 5 to 80 μm, a porosity in the range of 20 to 80%, and a pore diameter in the range of 0.01 to 5 μm, wherein said porous membrane comprises minute pores blocked with a vinyl type copolymer of a methacrylate type copolymer comprising a methacrylate monomer possessing a perfluoroalkyl side chain and said porous membrane is coated with said vinyl type copolymer on a side wall exposed to blood.
Claim 14
Dependent Claim
89 words
A gas-exchange membrane for an artificial lung comprising a porous membrane having a wall thickness in the range of 5 to 80 μm, a porosity in the range of 20 to 80%, and a pore diameter in the range of 0.01 to 5 μm, wherein said porous membrane comprises minute pores blocked with a vinyl type copolymer of a methacrylate type copolymer comprising a methacrylate monomer possessing a perfluoroalkyl side chain and said porous membrane is coated with said vinyl type copolymer on a side wall exposed to blood.
Claim 15
Dependent Claim
20 words
A gas-exchange membrane for an artificial lung according to claim 12, wherein said vinyl type copolymer is a block copolymer.
Claim 16
Dependent Claim
51 words
A gas-exchange membrane for an artificial lung according to claim 13, wherein the weight ratio of a polymer component formed of a vinyl monomer possessing a perfluoroalkyl side chain to a polymer component formed of another monomer of said vinyl type block copolymer is in the range of 0.25 to 1.5.
Claim 17
Dependent Claim
28 words
A gas-exchange membrane for an artificial lung according to claim 12, wherein said perfluoroalkyl side chain is --CH 2 CH 2 (CF 2 ) 7 CF 3 .
Claim 18
Dependent Claim
22 words
A gas-exchange membrane for an artificial lung according to claim 12, wherein said porous membrane is made of an olefin type resin.
Claim 19
Dependent Claim
18 words
A gas-exchange membrane for an artificial lung according to claim 16, wherein said membrane is made of polypropylene.
Claim 20
Dependent Claim
19 words
A gas-exchange membrane for an artificial lung according to claim 12, wherein said membrane is a hollow fiber membrane.
Claim 21
Dependent Claim
28 words
A gas-exchange membrane of an artificial lung according to claim 18, wherein said hollow fiber membrane has an inside diameter in the range of 100 to 1,000 μm.
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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) | 1995-04-21 | 1995-10-21 | 1996-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-21 | 1999-10-21 | 2000-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-21 | 2003-10-21 | 2004-04-21 | $7700.00 | Window Closed / Lapsed |