Patent US2797401A successfully refreshed from Google Patents.
Patent US4178329A successfully refreshed from Google Patents.
US4178329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastics material having an improved blood tolerance
Assignee: Hoechst AG
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Filing: 1978-05-05
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Granted: 1979-12-11
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Expires: 1998-05-05
Abstract
Abstract What is disclosed is a plastics material adaptable to biomedical uses, the surface of which material at least partially consists of a graft copolymer having a hydrocarbon main chain and side chains grafted thereon, said side chains being polymers comprising at least one vinyl monomer selected from the group consisting of acrylic acid esters of the formula CF.sub.3 --(CF.sub.2).sub.x --(CH.sub.2).sub.y --O--CO--CH═CH.sub.2, where x is an integer from 3 to 16 and y is an integer from 1 to 12, vinylene carbonate, N-vinyl alkylamides of the formula ##STR1## wherein R 1 and R 2 are the same or different and each is hydrogen or alkyl having 1 to 6 carbon atoms.
Inventors
- 👤 Udo Becker
- 👤 Karlheinz Burg
- 👤 Johann P. Fischer
- 👤 Norbert Heimburger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:11
CPC Classifications
C; C08; C08F; C08F255/00; A; A61; A61L; A61L33/00; A61L33/06; A61L33/064; C08F8/00; C08F8/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
A plastics material, adaptable to biomedical uses, the surface of which material at least partially consists of a graft copolymer having a hydrocarbon main chain and side chains grafted thereon, said side chains being polymers comprising at least one vinyl monomer selected from the group consisting of vinylene carbonate and N-vinyl alkylamides of the formula ##STR4## wherein R 1 and R 2 are the same or different and each is hydrogen or alkyl having 1 to 6 carbon atoms.
Claim 2
Dependent Claim
79 words
A plastics material, adaptable to biomedical uses, the surface of which material at least partially consists of a graft copolymer having a hydrocarbon main chain and side chains grafted thereon, said side chains being polymers comprising at least one vinyl monomer selected from the group consisting of vinylene carbonate and N-vinyl alkylamides of the formula ##STR4## wherein R 1 and R 2 are the same or different and each is hydrogen or alkyl having 1 to 6 carbon atoms.
Claim 3
Dependent Claim
26 words
A plastics material as in claim 1 wherein the polymers of said side chains additionally comprise vinyl monomers other than said vinylene carbonate or N-vinyl alkylamides.
Claim 4
Dependent Claim
15 words
A plastics material as in claim 1 wherein said hydrocarbon main chain is a polyolefin.
Claim 5
Dependent Claim
20 words
A plastics material as in claim 2 wherein said polyolefin has a weight average molecular weight from 50,000 to 2,000,000.
Claim 6
Dependent Claim
20 words
A plastics material as in claim 1 wherein aid graft copolymer has a graft degree from 0.01 to 80 percent.
Claim 7
Dependent Claim
16 words
A shaped article for biomedical use consisting essentially of a plastics material as in claim 1.
Claim 8
Dependent Claim
20 words
A shaped article for biomedical use, surface portions of which article consist of a plastics material as in claim 1.
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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) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |