Patent US6409752B1 successfully refreshed from Google Patents.
US6409752B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible stent having a pattern formed from a sheet of material
Assignee: Cook Medical Technologies LLC
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Filing: 1996-11-13
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Granted: 2002-06-25
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Expires: 2016-11-13
Abstract
Abstract A flexible stent having a waveform pattern formed from a sheet of biocompatible material and into a tubular shape for maintaining the patency of a lumen such as in a coronary vessel. The waveform pattern of the stent is formed from a flat sheet of malleable, biocompatible material by, for example, photochemically etching the sheet and leaving a framework or plurality of closed cells. The waveform pattern is formed into a tubular shape around a deflated, delivery catheter balloon with segments of the closed cells being interposed only overlapping a reinforcing member extending longitudinally along the stent. The stent material is treated to reduce the coefficient of friction of the material and to aid in the radial expansion of the stent with the balloon. Radiopaque markers are positioned at the ends of the stent to aid the physician in positioning the stent at an occlusion site.
Inventors
- 👤 Scott E. Boatman
- 👤 Kimberly D. Brummett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:14
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/88; A61F2/885; A61F2/92; A61F2/95; A61F2/958; A61F2240/00; A61F2240/001; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0098
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
88 words
A stent comprising: a member having opposite free ends and formed of a sheet of biocompatible material having a pattern in a surface of said sheet, said pattern including in said sheet a plurality of cells, said pattern further including an eyelet at at least one of said free ends of said member, said eyelet being of a fixed size smaller than a respective said cell, and wherein a radiopaque marker is positioned in said eyelet to clearly indicate a location of the at least one free end.
Claim 2
Dependent Claim
88 words
A stent comprising: a member having opposite free ends and formed of a sheet of biocompatible material having a pattern in a surface of said sheet, said pattern including in said sheet a plurality of cells, said pattern further including an eyelet at at least one of said free ends of said member, said eyelet being of a fixed size smaller than a respective said cell, and wherein a radiopaque marker is positioned in said eyelet to clearly indicate a location of the at least one free end.
Claim 3
Dependent Claim
27 words
The stent of claim 1 wherein said radiopaque marker comprises a radiopaque material from a group consisting of at least one of gold, platinum, tungsten, or iridium.
Claim 4
Dependent Claim
24 words
The stent of claim 2 wherein said radiopaque material is melted into position in said eyelet and extends across an opening through said eyelet.
Claim 5
Dependent Claim
24 words
The stent of claim 2 wherein said radiopaque material is crimped into position in said eyelet and extends across an opening through said eyelet.
Claim 6
Dependent Claim
24 words
The stent of claim 1 further comprising a coating material over at least one of said sheet of biocompatible material and said radiopaque marker.
Claim 7
Dependent Claim
23 words
The stent of claim 5 wherein said coating material comprises at least of a group consisting of parylene, polytetrafluoroethylene, or an antithrombotic material.
Claim 8
Dependent Claim
34 words
The stent of claim 5 wherein said coating material has a coefficient of friction less than a coefficient of friction of at least one of said sheet of biocompatible material and said radiopaque marker.
Claim 9
Dependent Claim
25 words
The stent of claim 1 wherein at least one of said sheet of biocompatible material and said radiopaque marker has a predetermined surface energy density.
Claim 10
Dependent Claim
19 words
The stent of claim 1 , wherein said sheet of biocompatible material includes a seamless sheet of biocompatible material.
Claim 11
Dependent Claim
21 words
The stent of claim 1 , wherein said pattern further includes radiopaque markers at both said free ends of the stent.
Claim 12
Dependent Claim
13 words
The stent of claim 1 , wherein said eyelet is a closed ring.
Claim 13
Dependent Claim
20 words
The stent of claim 1 , wherein the eyelet is defined by an opening through a thickness of said sheet.
Claim 14
Dependent Claim
105 words
A tubular-shaped stent comprising: a sheet of biocompatible material having a tubular shape and a pattern in a surface of said sheet, said pattern including a plurality of cells in said surface of said sheet; said sheet includes an eyelet at at least one free end of said pattern that is defined by an opening through a thickness of said sheet, said eyelet being of a fixed size smaller than a respective said cell and a radiopaque marker at said at least one free end of said sheet and positioned in said eyelet to clearly indicate a location of the at least one free end.
Claim 15
Dependent Claim
105 words
A tubular-shaped stent comprising: a sheet of biocompatible material having a tubular shape and a pattern in a surface of said sheet, said pattern including a plurality of cells in said surface of said sheet; said sheet includes an eyelet at at least one free end of said pattern that is defined by an opening through a thickness of said sheet, said eyelet being of a fixed size smaller than a respective said cell and a radiopaque marker at said at least one free end of said sheet and positioned in said eyelet to clearly indicate a location of the at least one free end.
Claim 16
Dependent Claim
21 words
The tubular-shaped stent of claim 13 further comprising another radiopaque marker at an other of said free ends of said sheet.
Claim 17
Dependent Claim
14 words
The tubular-shaped stent of claim 13 wherein said radiopaque marker includes a radiopaque material.
Claim 18
Dependent Claim
24 words
The tubular-shaped stent of claim 15 wherein said radiopaque material comprises at least one of a group consisting of gold, platinum, tungsten, or iridium.
Claim 19
Dependent Claim
16 words
The tubular-shaped stent of claim 15 further comprising a coating material posited over said radiopaque material.
Claim 20
Dependent Claim
25 words
The tubular-shaped stent of claim 17 wherein said coating material comprises at least one of a group consisting of parylene, polytetrafluoroethylene, or an antithrombotic material.
Claim 21
Dependent Claim
26 words
The tubular-shaped stent of claim 13 wherein said radiopaque marker comprises gold melted into position in said eyelet and extends across an opening through said eyelet.
Claim 22
Dependent Claim
26 words
The tubular-shaped stent of claim 13 wherein said radiopaque marker comprises gold crimped into position into said eyelet and extends across an opening through said eyelet.
Claim 23
Dependent Claim
20 words
The tubular-shaped stent of claim 13 , wherein said sheet of biocompatible material includes a seamless sheet of biocompatible material.
Claim 24
Dependent Claim
22 words
The tubular-shaped stent of claim 13 , wherein said pattern further includes radiopaque markers at both said free ends of the stent.
Claim 25
Dependent Claim
14 words
The tubular-shaped stent of claim 13 , wherein said eyelet is a closed ring.
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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) | 2005-06-24 | 2005-12-24 | 2006-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-06-24 | 2009-12-24 | 2010-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-06-24 | 2013-12-24 | 2014-06-25 | $7700.00 | Window Closed / Lapsed |