US6161399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing a wire reinforced monolayer fabric stent
Assignee: Vascular Concepts Holdings Ltd
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Filing: 1998-07-02
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Granted: 2000-12-19
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Expires: 2018-07-02
Abstract
Abstract A stent is made of a fabric interlaced in a knitting machine. The knitting machine receives a plurality of fabric strands and at least one wire strand from spools and knits them into a tubular fabric stent having at least one reinforcing wire interwoven in the fabric. If desired, the spool carrying the wire may rotate more slowly than the yarn spools so that the wire is braided about the yarn locking the yarn together. The wire may be made of materials such as Stainless Steel, Tungsten, Titanium, NITINOL a nickel-titanium alloy, Gold or Silver.
Inventors
- 👤 Swaminathan Jayaraman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:01
CPC Classifications
D; D04; D04B; D04B1/00; D04B1/14; D04B1/22; D04B21/00; D04B21/20; D04B21/205; D04C; D04C1/00; D04C1/06; D10; D10B; D10B2509/00; D10B2509/06
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
83 words
A process for making a stent comprising (a) providing at least one wire strand; (b) providing a plurality of textile strands; (c) interlacing the at least one wire strand to the textile strands at a ratio of about 1:2 into a tightly held together monolayer integrated tubular shape having a double wall thickness at least 1/5 an end diameter of the stent, the tubular shape adapted to have axial and radial compressibility for insertion into a vascular or nonvascular system of the body.
Claim 2
Dependent Claim
83 words
A process for making a stent comprising (a) providing at least one wire strand; (b) providing a plurality of textile strands; (c) interlacing the at least one wire strand to the textile strands at a ratio of about 1:2 into a tightly held together monolayer integrated tubular shape having a double wall thickness at least 1/5 an end diameter of the stent, the tubular shape adapted to have axial and radial compressibility for insertion into a vascular or nonvascular system of the body.
Claim 3
Dependent Claim
31 words
The process according to claim 1 wherein the wire strands interlaced to the textile strands are selected from the group consisting of stainless steel, tungsten, titanium, nickel-titanium alloy, gold and silver.
Claim 4
Dependent Claim
12 words
The process according to claim 1 wherein two wire strands are provided.
Claim 5
Dependent Claim
26 words
The process according to claim 3 wherein the two wire strands are interlaced to the textile strands that spiral from opposing directions creating a diamond pattern.
Claim 6
Dependent Claim
24 words
The process according to claim 1 wherein the at least one wire strand is a single wire spiraling around the circumference of the stent.
Claim 7
Dependent Claim
22 words
The process according to claim 1 wherein the at least one wire strand are multiple wire strands employed in a square-wave pattern.
Claim 8
Dependent Claim
19 words
The process according to claim 1 wherein the at least one wire strand is employed in a coil pattern.
Claim 9
Dependent Claim
25 words
The process according to claim 1 wherein interlacing the at least one wire strand to the textile strands is carried out in a knitting machine.
Claim 10
Dependent Claim
29 words
The process according to claim 8 wherein an intake section of the knitting machine receives at least three strands of yarn and at least one strand of reinforcing wire.
Claim 11
Dependent Claim
31 words
The process according to claim 9 wherein a brake mechanism on a spool supplying the wire causes the spool to supply wire at a slower rate than spools supplying the yarn.
Claim 12
Dependent Claim
23 words
The process according to claim 1 wherein the textile strands are selected from the group consisting of polyester, polypropylene, polyethylene, polyurethane and polytetrafluoroethylene.
Claim 13
Dependent Claim
22 words
A process according to claim 1 wherein the at least one wire strand is provided with a diameter of about 0.004 inches.
Claim 14
Dependent Claim
15 words
The process according to claim 1 wherein the at least one wire strand is flat.
Claim 15
Dependent Claim
23 words
The process according to claim 1 wherein the at least one wire strands has a "Z" pattern with respect to the textile portion.
Claim 16
Dependent Claim
100 words
A process for making a reinforced stent adapted to have axial and radial compressibility for insertion into a blood vessel, the process comprising, (a) providing a knitting machine with an intake portion; (b) providing multiple textile strands from separate textile supply spools to the intake portion; (c) providing at least one wire strand to the intake portion from a wire supply spool; and (d) interlacing the at least one wire strand to the textile strands to form a tightly held together monolayer integrated tubular shape having a double wall thickness at least 1/5 an end diameter of the reinforced stent.
Claim 17
Dependent Claim
100 words
A process for making a reinforced stent adapted to have axial and radial compressibility for insertion into a blood vessel, the process comprising, (a) providing a knitting machine with an intake portion; (b) providing multiple textile strands from separate textile supply spools to the intake portion; (c) providing at least one wire strand to the intake portion from a wire supply spool; and (d) interlacing the at least one wire strand to the textile strands to form a tightly held together monolayer integrated tubular shape having a double wall thickness at least 1/5 an end diameter of the reinforced stent.
Claim 18
Dependent Claim
17 words
The process according to claim 15 wherein the wire strand to textile strand ratio is about 1:2.
Claim 19
Dependent Claim
17 words
The process according to claim 15 wherein the at least one wire strand are two wire strands.
Claim 20
Dependent Claim
23 words
The process according to claim 15 wherein the at least one wire strand has a "Z" pattern with respect to the textile portion.
Claim 21
Dependent Claim
17 words
The process according to claim 15 wherein the at least one wire strand is a braided multifilament.
Claim 22
Dependent Claim
26 words
The process according to claim 15 wherein the reinforced stent is coated with biological matter selected from the group consisting of anticoagulants and antifibrotic healing agents.
Claim 23
Dependent Claim
25 words
The process according to claim 15 wherein the reinforced stent is coated with an antitumor agent selected from the family consisting of taxol and epothilone.
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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) | 2003-12-19 | 2004-06-19 | 2004-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-12-19 | 2008-06-19 | 2008-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-12-19 | 2012-06-19 | 2012-12-19 | $7700.00 | Window Closed / Lapsed |