US4424311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antithrombogenic biomedical material
Assignee: Toray Industries Inc
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Filing: 1982-06-30
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Granted: 1984-01-03
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Expires: 2002-06-30
Abstract
Abstract Provided is an antithrombogenic biomedical material comprising a copolymer of (A) not less than 5% by weight of one or more polymerizable monomers having a polyethylene oxide unit with a degree of polymerization not less than 5 and a polymerizable carbon-carbon double bond and (B) not more than 95% by weight of one or more monomers copolymerizable with said monomer (A).
Inventors
- 👤 Shoji Nagaoka
- 👤 Hidefumi Takiuchi
- 👤 Yuichi Mori
- 👤 Tetsuya Kikuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:32
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/003; A; A61; A61L; A61L29/00; A61L29/04; A61L29/041; A61L33/00; A61L33/06; A61L33/064; B; B01; B01D; B01D71/00; B01D71/06; B01D71/28; B01D71/40; B01D71/401; B01D71/76; B01D71/78; B01D71/80; C08F; C08F259/00; C08F259/02; C08F259/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
99 words
An antithrombogenic biomedical material comprising a graft copolymer obtained by graft copolymerization not less than 5% by weight, based on total weight of the monomers constituting the graft copolymer, of one or more polymerizable monomers (A) having a polyethylene oxide unit with a degree of polymerization not less than 5 and a polymerizable carbon-carbon double bond onto a polymer (B) obtained by polymerization of one or more monomers copolymerizable with the monomer or monomers A, wherein said polymer (B) is a polymer or copolymer containing not less than 10% by weight, in terms of monomer, of vinyl chloride units.
Claim 2
Dependent Claim
99 words
An antithrombogenic biomedical material comprising a graft copolymer obtained by graft copolymerization not less than 5% by weight, based on total weight of the monomers constituting the graft copolymer, of one or more polymerizable monomers (A) having a polyethylene oxide unit with a degree of polymerization not less than 5 and a polymerizable carbon-carbon double bond onto a polymer (B) obtained by polymerization of one or more monomers copolymerizable with the monomer or monomers A, wherein said polymer (B) is a polymer or copolymer containing not less than 10% by weight, in terms of monomer, of vinyl chloride units.
Claim 3
Dependent Claim
23 words
The biomedical material of claim 1 wherein the amount of said monomer (A) is in the range of 10 to 95% by weight.
Claim 4
Dependent Claim
23 words
The biomedical material of claim 1 wherein the amount of said monomer (A) is in the range of 15 to 90% by weight.
Claim 5
Dependent Claim
30 words
The biomedical material of any one of claim 1 through 3 wherein the equilibrium water content at 25° C. of said copolymer is in the range of 5 to 90%.
Claim 6
Dependent Claim
22 words
The biomedical material of claim 4 wherein the equilibrium water content of said copolymer is in the range of 20 to 70%.
Claim 7
Dependent Claim
48 words
The biomedical material of claim 1 wherein said monomer (A) is a compound represented by the formula ##STR3## or the formula ##STR4## where n≧5, R 1 is hydrogen or CH 3 and R 2 is hydroxyl, C 1 -C 4 alkoxy or OCHPh 2 where Ph is phenyl.
Claim 8
Dependent Claim
19 words
The biomedical material of claim 6 wherein n in the formulae is an integer ranging from 9 to 300.
Claim 9
Dependent Claim
13 words
The biomedical material of claim 1 wherein said polymer (B) is polyvinyl chloride.
Claim 10
Dependent Claim
19 words
The biomedical material of claim 1 wherein said polymer (B) is vinyl-chloride-vinyl acetate copolymer or vinyl chloride-vinyl acetate-ethylene terpolymer.
References Cited (Backward Citations)
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US4279795A
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US4038264A
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US4028295A
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US4170582A
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US4200563A
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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) | 1987-01-02 | 1987-07-04 | 1988-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-02 | 1991-07-04 | 1992-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-02 | 1995-07-04 | 1996-01-03 | $7700.00 | Window Closed / Lapsed |