US4304010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular polytetrafluoroethylene prosthesis with porous elastomer coating
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1979-10-12
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Granted: 1981-12-08
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Expires: 1999-10-12
Abstract
Abstract A tubular prosthesis comprising a porous tubing of polytetrafluoroethylene having a micro structure composed of fibers and nodes connected to one another by said fibers, said fibers being radially distributed, and a porous coating on the outside surface of said polytetrafluoroethylene tubing and a process for producing the same is disclosed.
Inventors
- 👤 Hiroshi Mano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 15:56
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/28; A61L27/34; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61L27/14; A61L27/16
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
46 words
A tubular organic prosthesis comprising a porous tubing of polytetrafluoroethylene having a microstructure composed of fibers and nodes connected to one another by said fibers, said fibers being radially distributed, and a porous coating of an elastomer bound to the outside surface of said polytetrafluoroethylene tubing.
Claim 2
Dependent Claim
46 words
A tubular organic prosthesis comprising a porous tubing of polytetrafluoroethylene having a microstructure composed of fibers and nodes connected to one another by said fibers, said fibers being radially distributed, and a porous coating of an elastomer bound to the outside surface of said polytetrafluoroethylene tubing.
Claim 3
Dependent Claim
28 words
The tubular organic prosthesis of claim 1, wherein said elastomer is selected from the group consisting of fluorine rubber, silicone rubber, urethane rubber, acrylic rubber and natural rubber.
Claim 4
Dependent Claim
12 words
The tubular organic prosthesis of claim 1, wherein said elastomer is crosslinked.
Claim 5
Dependent Claim
17 words
The tubular organic prosthesis of claim 1 having a suture tear resistance of at least 350 g/ply.
Claim 6
Dependent Claim
29 words
The tubular organic prosthesis of claim 1, wherein said elastomer is a fluorine rubber selected from the group consisting of vinylidene fluoride/hexafluoropropylene copolymer, vinylidene fluoride/chlorotrifluoroethylene copolymer and tetrafluoroethylene/propylene copolymer.
Claim 7
Dependent Claim
17 words
The tubular organic prosthesis of claim 5 having a suture tear resistance of at least 350 g/ply.
Claim 8
Dependent Claim
19 words
The tubular organic prosthesis of claim 1, wherein said elastomeric coating has a porosity of about 50% to 90%.
Claim 9
Dependent Claim
18 words
The tubular organic prosthesis of claim 1, wherein said elastomeric coating is about 20 to 500 μm thick.
Claim 10
Dependent Claim
51 words
The tubular organic prosthesis of claim 1, wherein said elastomeric coating is prepared by coating a liquid elastomer or a solution of an elastomer on the outside surface of said porous tubing and applying a negative pressure to the inside wall of said tubing to thereby render the elastomeric coating porous.
Claim 11
Dependent Claim
17 words
The tubular organic prosthesis of claim 9 having a suture tear resistance of at least 350 g/ply.
Claim 12
Dependent Claim
16 words
The tubular organic prosthesis of claim 1, wherein said tubular organic prosthesis is a vascular prosthesis.
Claim 13
Dependent Claim
17 words
The tubular organic prosthesis of claim 11 having a suture tear resistance of at least 350 g/ply.
Claim 14
Dependent Claim
38 words
The tubular organic prosthesis of claim 1, wherein said PTFE tubing has an average pore diameter of at least 2 μm, a porosity of at least about 70% and a wall thickness of about 0.3 to 1.0 mm.
Claim 15
Dependent Claim
29 words
The tubular organic prosthesis of claim 13, wherein said elastomer is a fluorine rubber selected from the group consisting of vinylidene fluoride/hexafluoropropylene copolymer, vinylidene fluoride/chlorotrifluoroethylene copolymer and tetrafluoroethylene/propylene copolymer.
Claim 16
Dependent Claim
17 words
The tubular organic prosthesis of claim 14 having a suture tear resistance of at least 350 g/ply.
References Cited (Backward Citations)
US3279996A
Cited
US3479670A
Cited
US3585647A
Cited
US4011861A
Cited
SU562278A1
Cited
US4208745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |