Patent US5509931A successfully refreshed from Google Patents.
US5509931A
Expired / Lapsed
US
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Ravel-resistant self-supporting woven vascular graft
Assignee: Maquet Cardiovascular LLC
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Filing: 1994-01-28
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Granted: 1996-04-23
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Expires: 2014-01-28
Abstract
Abstract A ravel-resistant, self-supporting woven synthetic fabric vascular graft including a fusible fiber integrated into the weave in the filling yarn is provided. The graft is woven from multifilament polyester warp yarns which can be textured or flat. The filling yarn includes a low melting fusible fiber or resin which can be combined with a stiff monofilament. The monofilament component provides radial rigidity to improve kink and crush resistance. After heat setting, the low melting fusible resin fuses to orthogonal warp yarns at each intersection and provides ravel resistance to the finished graft. Improved kink resistance make the tubular grafts suitable for use in medium and small diameter peripheral applications. A preferred graft has a single velour outer surface and a smooth inner surface.
Inventors
- 👤 Peter J. Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:33
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61L; A61L27/00; A61L27/50; A61L27/507; A61L27/14; A61L27/18; A61L27/28; A61L27/34; D; D03; D03D; D03D15/00; D03D15/20; D03D15/283; D03D15/40; D03D15/41; D03D15/44; D03D15/46; D03D15/47; D03D15/49; D03D15/50; D03D15/573; D03D15/587; D03D27/00; D03D3/00; D03D3/02; A61F2002/065; C; C08; C08L; C08L67/00; C08L67/02; D10; D10B; D10B2321/00; D10B2321/02; D10B2321/021; D10B2321/04; D10B2321/042; D10B2331/00; D10B2331/04; D10B2331/10; D10B2401/00; D10B2401/04; D10B2401/041; D10B2401/06; D10B2401/062; D10B2509/00; D10B2509/06; Y; Y10; Y10S; Y10S623/00; Y10S623/92; Y10S623/921
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
81 words
A ravel-resistant and self-supporting tubular synthetic fabric vascular graft resistant to kinking, comprising: a plurality of warp yarns woven with at least one filling yarn to form a weave; the filling yarn including a stiffening component in the weave which is heat set in a rounded condition to render the tubular graft self supporting; and the weave including a low melting temperature fusible component having a melting temperature lower than the other yarns to bond to adjacent yarns when heat set.
Claim 2
Dependent Claim
81 words
A ravel-resistant and self-supporting tubular synthetic fabric vascular graft resistant to kinking, comprising: a plurality of warp yarns woven with at least one filling yarn to form a weave; the filling yarn including a stiffening component in the weave which is heat set in a rounded condition to render the tubular graft self supporting; and the weave including a low melting temperature fusible component having a melting temperature lower than the other yarns to bond to adjacent yarns when heat set.
Claim 3
Dependent Claim
19 words
The woven vascular graft of claim 1, further including a low melting temperature fusible component in the filling yarn.
Claim 4
Dependent Claim
30 words
The woven vascular graft of claim 1, wherein the low melting fusible component is a bicomponent fiber having a high melting temperature core and a low melting temperature polymer sheath.
Claim 5
Dependent Claim
15 words
The woven vascular graft of claim 1, wherein the warp yarns include multifilament textile yarns.
Claim 6
Dependent Claim
14 words
The woven vascular graft of claim 4, wherein the multifilament yarns are polyethylene terephthalate.
Claim 7
Dependent Claim
18 words
The woven vascular graft of claim 5, wherein the multifilament polyethylene terephthalate warp yarns are unshrunk untexturized yarns.
Claim 8
Dependent Claim
18 words
The woven vascular graft of claim 1, wherein the stiffening component is a monofilament yarn of polyethylene terephthalate.
Claim 9
Dependent Claim
16 words
The woven vascular graft of claim 1, wherein the monofilament yarn is a 5 mil yarn.
Claim 10
Dependent Claim
37 words
The woven vascular graft of claim 8, wherein the vascular graft is a tube with a single outside velour surface and a smooth interior surface, the velour surface formed from warp pile yarns of texturized multifilament yarn.
Claim 11
Dependent Claim
26 words
The woven vascular graft of claim 1, wherein the graft has at least one velour surface of a plurality of warp pile yarns of multifilament yarns.
Claim 12
Dependent Claim
18 words
The woven vascular graft of claim 10, wherein the warp pile yarns alternate between each said warp yarn.
Claim 13
Dependent Claim
16 words
The woven vascular graft of claim 10, wherein the multifilament warp pile yarns are polyethylene terephthalate.
Claim 14
Dependent Claim
16 words
The woven vascular graft of claim 12, wherein the warp pile yarn is texturized polyethylene terephthalate.
Claim 15
Dependent Claim
38 words
The woven vascular graft of claim 10, wherein the vascular graft is a tube with a single outside velour surface and a smooth interior surface, the velour surface formed from warp pile yarns of preshrunk texturized multifilament yarn.
Claim 16
Dependent Claim
22 words
The woven vascular graft of claim 1, wherein the graft has been heat set to bond the fusible components to adjacent yarns.
Claim 17
Dependent Claim
26 words
The woven vascular graft of claim 1, wherein said weave is set in a longitudinally-compressed state to provide said graft with longitudinal compliance and kink resistance.
Claim 18
Dependent Claim
19 words
The woven vascular graft of claim 1, wherein said stiffening component is present in each pick of the weave.
Claim 19
Dependent Claim
30 words
The woven vascular graft of claim 1, wherein said weave further comprises a plurality of pile yarns for providing a velour surface on at least one side of said weave.
Claim 20
Dependent Claim
86 words
A self-supporting singular velour woven synthetic fabric vascular graft, comprising: a plurality of warp ground yarns and a plurality of warp pile yarns woven together with at least one filling yarn to form a weave; the filling yarn including a stiffening component in the weave which is heat set in a rounded condition to render the graft self-supporting; and the weave including a low melting temperature fusible component which melts at a lower temperature than the other yarn to bond to adjacent yarn when heat set.
Claim 21
Dependent Claim
86 words
A self-supporting singular velour woven synthetic fabric vascular graft, comprising: a plurality of warp ground yarns and a plurality of warp pile yarns woven together with at least one filling yarn to form a weave; the filling yarn including a stiffening component in the weave which is heat set in a rounded condition to render the graft self-supporting; and the weave including a low melting temperature fusible component which melts at a lower temperature than the other yarn to bond to adjacent yarn when heat set.
Claim 22
Dependent Claim
25 words
The woven vascular graft of claim 19, wherein the filling yarn includes a yarn of low melting fusible fibers wound together with the stiffening component.
Claim 23
Dependent Claim
37 words
The woven vascular graft of claim 19, wherein the low melting temperature fusible component is a yarn of bicomponent fibers having a core surrounded by a low melting temperature polymer sheath wound together with a monofilament yarn.
Claim 24
Dependent Claim
18 words
The woven vascular graft of claim 19, wherein the warp pile yarns alternate with the warp ground yarns.
Claim 25
Dependent Claim
37 words
The woven vascular graft of claim 22, wherein the vascular graft is a tube with a single outside velour surface and a smooth interior surface, the velour surface formed from warp pile yarn of texturized multifilament yarn.
Claim 26
Dependent Claim
16 words
The woven vascular graft of claim 22, wherein the warp ground yarn includes unshrunk untexturized yarn.
Claim 27
Dependent Claim
22 words
The woven vascular graft of claim 19, wherein the graft has been heated sufficiently to bond the fusible component to adjacent yarns.
Claim 28
Dependent Claim
30 words
The self-supporting single velour woven synthetic vascular graft of claim 19, wherein said weave is set in a longitudinally-compressed state to provide said graft with longitudinal compliance and kink resistance.
Claim 29
Dependent Claim
23 words
The self-supporting single velour woven synthetic vascular graft of claim 19, wherein said stiffening component is present in each pick of the weave.
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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) | 1999-04-23 | 1999-10-23 | 2000-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-23 | 2003-10-23 | 2004-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-23 | 2007-10-23 | 2008-04-23 | $7700.00 | Window Closed / Lapsed |