US6331189B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible medical stent
Assignee: Medtronic Inc
•
Filing: 1999-10-18
•
Granted: 2001-12-18
•
Expires: 2019-10-18
Abstract
Abstract The present invention is directed to a radially expandable medical stent having a chevron or “maple leaf” design geometry characterized by improved scaffolding, hoop strength and longitudinal flexibility. Also described are methods of making and deploying the stents.
Inventors
- 👤 Lone Wolinsky
- 👤 Arvi Penner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:36
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61F2/91; A61F2/915; A61F2002/91533; A61F2002/9155; A61F2002/91558; A61F2002/91583
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
99 words
A medical device comprising: a catheter and a radially expandable stent mounted on the catheter, the stent comprising a hollow, cylindrical body comprising first and second rings extending circumferentially around the cylindrical body, each ring comprising an undulating series of peaks and valleys formed by struts connecting alternating curved peak and valley segments within the ring, the struts comprising a first curved segment curved substantially symmetrically about a single circumference of the stent such that the peaks and valleys within a ring form a nested chevron pattern; and at least one longitudinal connection between the first and second rings.
Claim 2
Dependent Claim
99 words
A medical device comprising: a catheter and a radially expandable stent mounted on the catheter, the stent comprising a hollow, cylindrical body comprising first and second rings extending circumferentially around the cylindrical body, each ring comprising an undulating series of peaks and valleys formed by struts connecting alternating curved peak and valley segments within the ring, the struts comprising a first curved segment curved substantially symmetrically about a single circumference of the stent such that the peaks and valleys within a ring form a nested chevron pattern; and at least one longitudinal connection between the first and second rings.
Claim 3
Dependent Claim
23 words
The medical device of claim 1 wherein the struts further comprise a second curved segment positioned near a curved peak or valley segment.
Claim 4
Dependent Claim
23 words
The medical device of claim 1 wherein the first and second rings are arranged in a parallel chevron pattern relative to each other.
Claim 5
Dependent Claim
23 words
The medical device of claim 1 wherein the first and second rings are arranged in an antiparallel chevron pattern relative to each other.
Claim 6
Dependent Claim
23 words
The medical device of claim 1 wherein the peaks of the first ring are longitudinally aligned with the valleys of the second ring.
Claim 7
Dependent Claim
24 words
The medical device of claim 1 wherein the peaks of the first ring are not longitudinally aligned with the valleys of the second ring.
Claim 8
Dependent Claim
23 words
The medical device of claim 6 wherein the peaks of the first ring are longitudinally aligned with the peaks of the second ring.
Claim 9
Dependent Claim
18 words
The medical device of claim 1 wherein at least one longitudinal connection is formed by a longitudinal connector.
Claim 10
Dependent Claim
14 words
The medical device of claim 8 wherein at least one longitudinal connector is curved.
Claim 11
Dependent Claim
14 words
The medical device of claim 8 wherein at least one longitudinal connector is straight.
Claim 12
Dependent Claim
13 words
The medical device of claim 1 further comprising at least one radiopaque marker.
Claim 13
Dependent Claim
15 words
The medical device of claim 1 wherein the radially expandable stent is a balloon-expandable stent.
Claim 14
Dependent Claim
15 words
The medical device of claim 1 wherein the radially expandable stent is a self-expanding stent.
Claim 15
Dependent Claim
132 words
A medical device comprising: a catheter and a radially expandable stent mounted on the catheter, the stent comprising a hollow, cylindrical body comprising first and second rings extending circumferentially around the cylindrical body, each ring comprising an undulating series of peaks and valleys formed by struts connecting alternating curved peak and valley segments within the ring, the struts comprising a first curved segment curved substantially symmetrically about a single circumference of the stent such that the peaks and valleys within a ring form a nested chevron pattern; wherein at least one strut on each of the first and second rings further comprises an inflection point positioned on a central portion of the strut; and at least one longitudinal connector connecting the first and second rings at the inflection points on the struts.
Claim 16
Dependent Claim
132 words
A medical device comprising: a catheter and a radially expandable stent mounted on the catheter, the stent comprising a hollow, cylindrical body comprising first and second rings extending circumferentially around the cylindrical body, each ring comprising an undulating series of peaks and valleys formed by struts connecting alternating curved peak and valley segments within the ring, the struts comprising a first curved segment curved substantially symmetrically about a single circumference of the stent such that the peaks and valleys within a ring form a nested chevron pattern; wherein at least one strut on each of the first and second rings further comprises an inflection point positioned on a central portion of the strut; and at least one longitudinal connector connecting the first and second rings at the inflection points on the struts.
Claim 17
Dependent Claim
20 words
The medical device of claim 14 wherein the inflection points are positioned near the first curved segment of the struts.
Claim 18
Dependent Claim
12 words
The medical device of claim 14 wherein the longitudinal connector is curved.
Claim 19
Dependent Claim
23 words
The medical device of claim 16 wherein a portion of the longitudinal connector near the inflection point is substantially parallel to the strut.
Claim 20
Dependent Claim
23 words
The medical device of claim 14 wherein the struts further comprise a second curved segment positioned near a curved peak or valley segment.
Claim 21
Dependent Claim
23 words
The medical device of claim 14 wherein the first and second rings are arranged in a parallel chevron pattern relative to each other.
Claim 22
Dependent Claim
23 words
The medical device of claim 14 wherein the peaks of the first ring are longitudinally aligned with the valleys of the second ring.
Claim 23
Dependent Claim
24 words
The medical device of claim 14 wherein the peaks of the first ring are not longitudinally aligned with the valleys of the second ring.
Claim 24
Dependent Claim
23 words
The medical device of claim 21 wherein the peaks of the first ring are longitudinally aligned with the peaks of the second ring.
Claim 25
Dependent Claim
13 words
The medical device of claim 14 further comprising at least one radiopaque marker.
Claim 26
Dependent Claim
15 words
The medical device of claim 14 wherein the radially expandable stent is a balloon-expandable stent.
Claim 27
Dependent Claim
15 words
The medical device of claim 14 wherein the radially expandable stent is a self-expanding stent.
Claim 28
Dependent Claim
129 words
A medical device comprising: a catheter and a radially expandable stent mounted on the catheter, the stent comprising a hollow, cylindrical body comprising first and second rings extending circumferentially around the cylindrical body, the first and second rings each comprising a plurality of closed members, each closed member comprising a peak and valley formed by a longer strut and a shorter strut connecting curved peak and valley segments, the longer and shorter struts each comprising a curved segment curved substantially symmetrically about a single circumference of the stent such that the peaks and valleys within a ring form a nested chevron pattern; circumferential connectors between the longer strut and the shorter strut of circumferentially adjacent closed members; and at least one longitudinal connection between the first and second rings.
Claim 29
Dependent Claim
129 words
A medical device comprising: a catheter and a radially expandable stent mounted on the catheter, the stent comprising a hollow, cylindrical body comprising first and second rings extending circumferentially around the cylindrical body, the first and second rings each comprising a plurality of closed members, each closed member comprising a peak and valley formed by a longer strut and a shorter strut connecting curved peak and valley segments, the longer and shorter struts each comprising a curved segment curved substantially symmetrically about a single circumference of the stent such that the peaks and valleys within a ring form a nested chevron pattern; circumferential connectors between the longer strut and the shorter strut of circumferentially adjacent closed members; and at least one longitudinal connection between the first and second rings.
Claim 30
Dependent Claim
36 words
The medical device of claim 26 wherein the closed members further comprises an indentation positioned on the shorter strut, such that the indentation is substantially circumferentially aligned with the circumferential connector attached to the shorter strut.
Claim 31
Dependent Claim
23 words
The medical device of claim 26 wherein the first and second rings are arranged in a parallel chevron pattern relative to each other.
Claim 32
Dependent Claim
23 words
The medical device of claim 26 wherein the first and second rings are arranged in an antiparallel chevron pattern relative to each other.
Claim 33
Dependent Claim
23 words
The medical device of claim 26 wherein the peaks of the first ring are longitudinally aligned with the valleys of the second ring.
Claim 34
Dependent Claim
24 words
The medical device of claim 26 wherein the peaks of the first ring are not longitudinally aligned with the valleys of the second ring.
Claim 35
Dependent Claim
23 words
The medical device of claim 26 wherein the peaks of the first ring are longitudinally aligned with the peaks of the second ring.
Claim 36
Dependent Claim
18 words
The medical device of claim 26 wherein at least one longitudinal connection is formed by a longitudinal connector.
Claim 37
Dependent Claim
12 words
The medical device of claim 33 wherein the longitudinal connector is curved.
Claim 38
Dependent Claim
12 words
The medical device of claim 33 wherein the longitudinal connector is straight.
Claim 39
Dependent Claim
13 words
The medical device of claim 26 further comprising at least one radiopaque marker.
Claim 40
Dependent Claim
15 words
The medical device of claim 26 wherein the radially expandable stent is a balloon-expandable stent.
Claim 41
Dependent Claim
15 words
The medical device of claim 26 wherein the radially expandable stent is a self-expanding stent.
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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) | 2004-12-17 | 2005-06-18 | 2005-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-12-17 | 2009-06-18 | 2009-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-12-17 | 2013-06-18 | 2013-12-18 | $7700.00 | Window Closed / Lapsed |