US4193138A
Expired / Lapsed
US
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Composite structure vascular prostheses
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1977-08-17
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Granted: 1980-03-18
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Expires: 1997-08-17
Abstract
Abstract A composite structure vascular prosthesis comprising a porous polytetrafluoroethylene tube in which the pores of the porous polytetrafluoroethylene tube are filled with at least one water-insolubilized water-soluble polymer, and a process for producing the composite structure vascular prosthesis.
Inventors
- 👤 Koichi Okita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:39
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/40; C08J9/42; A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61L; A61L27/00; A61L27/14; A61L27/16; A61L27/28; A61L27/34; B; B29; B29C; B29C48/00; B29C48/022; B29C48/03; B29C48/09; B29C48/10; B29K; B29K2027/00; B29K2027/12; B29K2027/18; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18; C08J2421/00; C08J2433/00; C08J2439/00
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
28 words
A composite structure vascular prosthesis comprising a porous polytetrafluoroethylene tube in which the pores of the porous polytetrafluoroethylene tube are filled with at least one water-insolubilized water-soluble polymer.
Claim 2
Dependent Claim
28 words
A composite structure vascular prosthesis comprising a porous polytetrafluoroethylene tube in which the pores of the porous polytetrafluoroethylene tube are filled with at least one water-insolubilized water-soluble polymer.
Claim 3
Dependent Claim
22 words
The vascular prosthesis of claim 1, wherein the water-insolubilized water-soluble polymer is partly or completely crosslinked to form a microporous swollen gel.
Claim 4
Dependent Claim
44 words
The vascular prosthesis of claim 2, wherein the porous polytetrafluoroethylene tube has a microstructure of nodes connected to one another by fibers, and the microstructure differs between the outside surface of the porous polytetrafluoroethylene tube and the inside surface of the porous polytetrafluoroethylene tube.
Claim 5
Dependent Claim
17 words
The vascular prosthesis of claim 2, wherein the water-soluble polymer is a polymer containing a hydroxyl group.
Claim 6
Dependent Claim
14 words
The vascular prosthesis of claim 4, wherein the hydroxyl group-containing polymer is polyvinyl alcohol.
Claim 7
Dependent Claim
17 words
The vascular prosthesis of claim 2, wherein the water-soluble polymer is a polymer containing a carboxyl group.
Claim 8
Dependent Claim
14 words
The vascular prosthesis of claim 6, wherein the carboxyl group-containing polymer is polyacrylic acid.
Claim 9
Dependent Claim
15 words
The vascular prosthesis of claim 2, wherein the water-soluble polymer is a polymer containing nitrogen.
Claim 10
Dependent Claim
13 words
The vascular prosthesis of claim 8, wherein the nitrogen containing-polymer is polyvinyl pyrrolidone.
Claim 11
Dependent Claim
23 words
The vascular prosthesis of claim 2, wherein the water-soluble polymer is a mixture of a carboxyl group-containing polymer and a hydroxyl group-containing polymer.
Claim 12
Dependent Claim
19 words
The vascular prosthesis of claim 10, wherein the water-soluble polymer is a mixture of polyacrylic acid and polyvinyl alcohol.
Claim 13
Dependent Claim
22 words
The vascular prosthesis of claim 2, wherein the water-soluble polymer is a mixture of a nitrogen-containing polymer and a hydroxyl group-containing polymer.
Claim 14
Dependent Claim
19 words
The vascular prosthesis of claim 12, wherein the water-soluble polymer is a mixture of polyvinyl alcohol and polyvinyl pyrrolidone.
Claim 15
Dependent Claim
44 words
The vascular prosthesis of claim 1, wherein the porous polytetrafluoroethylene tube has a microstructure of nodes connected to one another by fibers, and the microstructure differs between the outside surface of the porous polytetrafluoroethylene tube and the inside surface of the porous polytetrafluoroethylene tube.
Claim 16
Dependent Claim
39 words
The vascular prosthesis of claim 14, wherein the diameter of fibers at the outside surface of the porous polytetrafluoroethylene tube is at least two times the diameter of the fibers at the inside surface of the porous polytetrafluoroethylene tube.
Claim 17
Dependent Claim
39 words
The vascular prosthesis of claim 14, wherein the directions of the fibers at the inside surface of the porous polytetrafluoroethylene tube are distributed more radially than those of the fibers at the outside surface of the porous polytetrafluoroethylene tube.
Claim 18
Dependent Claim
42 words
The vascular prosthesis of claim 14, wherein the long axis of each node at the outside surface of the porous polytetrafluoroethylene tube is at least two times the long axis of each node at the inside surface of the porous polytetrafluoroethylene tube.
Claim 19
Dependent Claim
34 words
The vascular prosthesis of claim 14, wherein the pore size of the outside surface of the porous polytetrafluoroethylene tube is larger than the pore size of the inside surface of the porous polytetrafluoroethylene tube.
Claim 20
Dependent Claim
17 words
The vascular prosthesis of claim 1, wherein the water-soluble polymer is a polymer containing a hydroxyl group.
Claim 21
Dependent Claim
14 words
The vascular prosthesis of claim 19, wherein the hydroxyl group-containing polymer is polyvinyl alcohol.
Claim 22
Dependent Claim
17 words
The vascular prosthesis of claim 1, wherein the water-soluble polymer is a polymer containing a carboxyl group.
Claim 23
Dependent Claim
14 words
The vascular prosthesis of claim 21, wherein the carboxyl group-containing polymer is polyacrylic acid.
Claim 24
Dependent Claim
15 words
The vascular prosthesis of claim 1, wherein the water-soluble polymer is a polymer containing nitrogen.
Claim 25
Dependent Claim
13 words
The vascular prosthesis of claim 23, wherein the nitrogen-containing polymer is polyvinyl pyrrolidone.
Claim 26
Dependent Claim
23 words
The vascular prosthesis of claim 1, wherein the water-soluble polymer is a mixture of a carboxyl group-containing polymer and a hydroxyl group-containing polymer.
Claim 27
Dependent Claim
19 words
The vascular prosthesis of claim 25, wherein the water-soluble polymer is a mixture of polyacrylic acid and polyvinyl alcohol.
Claim 28
Dependent Claim
22 words
The vascular prosthesis of claim 1, wherein the water-soluble polymer is a mixture of a nitrogen-containing polymer and a hydroxyl group-containing polymer.
Claim 29
Dependent Claim
19 words
The vascular prosthesis of claim 27, wherein the water-soluble polymer is a mixture of polyvinyl alcohol and polyvinyl pyrrolidone.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-18 | 1983-09-17 | 1984-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-18 | 1987-09-17 | 1988-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-18 | 1991-09-17 | 1992-03-18 | $7700.00 | Window Closed / Lapsed |