US4193137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Warp-knitted double-velour prosthesis
Assignee: Boston Scientific Scimed Inc
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Filing: 1977-05-06
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Granted: 1980-03-18
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Expires: 1997-05-06
Abstract
Abstract A warp-knitted fabric has pile loops on both faces thereof. The loops on both faces are continuous with each other so that when the fabric is used as a prosthesis, growth of tissue from one face to the other is facilitated. This feature is particularly significant when the fabric is fashioned into tubular form, whether straight or bifurcated. The structure of the fabric is such that a desired degree of rigidity is obtained with a thinner fabric than has hitherto been the case.
Inventors
- 👤 Rudolf N. Heck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:11
CPC Classifications
D; D04; D04B; D04B21/00; D04B21/02; A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; D04B21/20; A61F2002/065; D10; D10B; D10B2403/00; D10B2403/03; D10B2403/033; D10B2403/0333; D10B2509/00; D10B2509/06
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
135 words
A warp-knitted prosthesis, comprising a trellis, pile velour exterior to said trellis and pile velour interior to said trellis, said pile velour being in the form of loops protruding from said trellis, said trellis consisting of a flat thread of synthetic fiber warp-knitted in closed stitch, and said pile velour consisting of a texturized thread of synthetic fiber in open stitch passing through said trellis to form loops interior to and exterior to said trellis, said interior and exterior loops being continuous with each other for facilitating ingrowth of tissue from the exterior of said prosthesis to the interior thereof, the combination of a trellis warp-knitted of flat thread in closed stitch and a velour of texturized thread in open stitch providing minimum porosity, appropriate rigidity for functioning as a prosthesis and extremely fine hand.
Claim 2
Dependent Claim
135 words
A warp-knitted prosthesis, comprising a trellis, pile velour exterior to said trellis and pile velour interior to said trellis, said pile velour being in the form of loops protruding from said trellis, said trellis consisting of a flat thread of synthetic fiber warp-knitted in closed stitch, and said pile velour consisting of a texturized thread of synthetic fiber in open stitch passing through said trellis to form loops interior to and exterior to said trellis, said interior and exterior loops being continuous with each other for facilitating ingrowth of tissue from the exterior of said prosthesis to the interior thereof, the combination of a trellis warp-knitted of flat thread in closed stitch and a velour of texturized thread in open stitch providing minimum porosity, appropriate rigidity for functioning as a prosthesis and extremely fine hand.
Claim 3
Dependent Claim
29 words
The warp-knitted prosthesis as claimed in claim 1, wherein the underlapping of the thread of said trellis is opposed to the underlapping of the thread of said pile velour.
Claim 4
Dependent Claim
77 words
The warp-knitted prosthesis as claimed in claim 1, wherein the thread of said trellis is so disposed as to form a trellis underlap with respect to the thread of said pile velour interior to said trellis, said trellis underlap intersecting each of the pile underlap loops interior to said trellis and dividing each of said pile underlap loops into two sub-loops for providing twice as many sub-loops interior to said trellis as loops exterior to said trellis.
Claim 5
Dependent Claim
27 words
The warp-knitted prosthesis as claimed in claim 3, wherein the ratio of the length of said exterior loops to said interior sub-loops lies between 3:1 and 1:1.
Claim 6
Dependent Claim
23 words
The warp-knitted prosthesis as claimed in claim 1, wherein at least one of said trellis and said pile velour threads is single ply.
Claim 7
Dependent Claim
25 words
The warp-knitted prosthesis as claimed in claim 1, wherein at least one of said trellis and said pile threads is of a plurality of plies.
Claim 8
Dependent Claim
26 words
The warp-knitted prosthesis as claimed in claim 1, wherein the total count of the thread of said trellis is between about 30 and about 100 denier.
Claim 9
Dependent Claim
26 words
The warp-knitted prosthesis as claimed in claim 1, wherein the total count of the thread of said pile velour is between about 30 and 150 denier.
Claim 10
Dependent Claim
16 words
The warp-knitted prosthesis as claimed in claim 1, wherein said synthetic fiber thread is of polyester.
Claim 11
Dependent Claim
17 words
The warp-knitted prosthesis as claimed in claim 1, wherein said synthetic fiber thread is of polyethylene terephthalate.
Claim 12
Dependent Claim
21 words
The warp-knitted prosthesis as claimed in claim 1, wherein said thread is single ply of a count of about 40 denier.
Claim 13
Dependent Claim
18 words
The warp-knitted prosthesis as claimed in claim 11, wherein said thread consists of from 25 to 29 filaments.
Claim 14
Dependent Claim
21 words
The warp-knitted prosthesis as claimed in claim 1, wherein said thread is double ply with a count of about 80 denier.
Claim 15
Dependent Claim
25 words
The warp-knitted prosthesis as claimed in claim 1, wherein said thread has a count of about 80 denier and consists of 50 to 58 filaments.
Claim 16
Dependent Claim
35 words
The warp-knitted prosthesis as claimed in claim 1, wherein the ratio of the length of the thread of said pile velour to the length of the thread of said trellis lies between 2.2:1 and 1.2:1.
Claim 17
Dependent Claim
30 words
The warp-knitted prosthesis as claimed in claim 1, wherein said prosthesis is tubular in form, each comprising two elongated strips, said strips being joined together at the long edges thereof.
Claim 18
Dependent Claim
57 words
The warp-knitted prosthesis as claimed in claim 16, wherein said prosthesis is bifurcated, each comprising a first tubular section and two second tubular sections, said first tubular section being joined at one end thereof to one end of each of said second tubular sections, the join between said first and second sections being free of any gap.
Claim 19
Dependent Claim
14 words
The warp-knitted prosthesis as claimed in claim 16, wherein said prosthesis is circularly crimped.
Claim 20
Dependent Claim
14 words
The warp-knitted prosthesis as claimed in claim 17, wherein said prosthesis is circularly crimped.
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 |