Patent US6033433A successfully refreshed from Google Patents.
US6033433A
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Stent configurations including spirals
Assignee: Boston Scientific Scimed Inc
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Filing: 1997-04-25
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Granted: 2000-03-07
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Expires: 2017-04-25
Abstract
Abstract The invention is directed to an expandable stent which is longitudinally flexible in both the unexpanded and expanded conditions. The stent includes spiral structures which at least partially unwind upon expansion of the stent to limit stent recoil. Regions of low strain in the stent during expansion are provided by the spiral structures.
Inventors
- 👤 Timothy G. J. Ehr
- 👤 Graig L. Kveen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:28
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61F2/91; A61F2/915; A61F2002/91525; A61F2002/91533; A61F2002/91541; A61F2002/9155; A61F2002/91558; A61F2002/91583; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/0054
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
51 words
An expandable stent in the form of a generally tubular body formed of interconnected spiral elements, each spiral element formed of a plurality of spiral members, at least one spiral member of each spiral element intersecting at least one spiral member of a circumferentially adjacent spiral element in an oblique angle.
Claim 2
Dependent Claim
51 words
An expandable stent in the form of a generally tubular body formed of interconnected spiral elements, each spiral element formed of a plurality of spiral members, at least one spiral member of each spiral element intersecting at least one spiral member of a circumferentially adjacent spiral element in an oblique angle.
Claim 3
Dependent Claim
15 words
The stent of claim 1 including annular serpentine elements at the ends of the stent.
Claim 4
Dependent Claim
61 words
A stent comprised of: a plurality of longitudinally aligned and expandable segments of generally cylindrical configuration; a pair of connector elements extending from a segment to join a corresponding pair of connector elements extending from an adjacent segment, the connector elements forming a spiral configuration between the segments, the connector elements at least partially unwinding upon expansion of the adjoining segments.
Claim 5
Dependent Claim
61 words
A stent comprised of: a plurality of longitudinally aligned and expandable segments of generally cylindrical configuration; a pair of connector elements extending from a segment to join a corresponding pair of connector elements extending from an adjacent segment, the connector elements forming a spiral configuration between the segments, the connector elements at least partially unwinding upon expansion of the adjoining segments.
Claim 6
Dependent Claim
19 words
The stent of claim 3 wherein at least two of the connecting elements extend in a substantially longitudinal direction.
Claim 7
Dependent Claim
12 words
The stent of claim 3 wherein the connecting elements are substantially curvilinear.
Claim 8
Dependent Claim
80 words
A stent comprised of: a plurality of expandable segments of annular serpentine configuration, each segment having a plurality of loops, the loops having ends; connector elements extending between adjacent serpentine segments, the connector elements forming spiral configurations between the segments, the spiral configurations formed exclusively of connector elements terminating in annular segments, each spiral configuration defined by a center about which the connector elements spiral, all of the connector elements spiraling in excess of a quarter revolution about the center.
Claim 9
Dependent Claim
80 words
A stent comprised of: a plurality of expandable segments of annular serpentine configuration, each segment having a plurality of loops, the loops having ends; connector elements extending between adjacent serpentine segments, the connector elements forming spiral configurations between the segments, the spiral configurations formed exclusively of connector elements terminating in annular segments, each spiral configuration defined by a center about which the connector elements spiral, all of the connector elements spiraling in excess of a quarter revolution about the center.
Claim 10
Dependent Claim
14 words
The stent of claim 6 wherein the connector elements extend from the loop ends.
Claim 11
Dependent Claim
25 words
The stent of claim 6 wherein the spiral configurations are arranged in rows, the rows of spirals alternating with the expandable segments along the stent.
Claim 12
Dependent Claim
22 words
The stent of claim 6 wherein the loops are oriented at an oblique angle relative to the longitudinal axis of the stent.
Claim 13
Dependent Claim
19 words
The stent of claim 6 wherein each loop includes a portion which is oriented in a substantially circumferential direction.
Claim 14
Dependent Claim
82 words
A stent comprised of: a plurality of expandable segments of annular serpentine configuration, each segment having a plurality of loops, the loops having ends; connector elements extending between adjacent serpentine segments, the connector elements forming spiral configurations between the segments, the spiral configurations formed exclusively of connector elements terminating in annular segments, the spiral configurations arranged in rows, the rows of spirals alternating with the expandable segments along the stent, wherein pairs of adjacent spiral configurations extend from a common loop end.
Claim 15
Dependent Claim
82 words
A stent comprised of: a plurality of expandable segments of annular serpentine configuration, each segment having a plurality of loops, the loops having ends; connector elements extending between adjacent serpentine segments, the connector elements forming spiral configurations between the segments, the spiral configurations formed exclusively of connector elements terminating in annular segments, the spiral configurations arranged in rows, the rows of spirals alternating with the expandable segments along the stent, wherein pairs of adjacent spiral configurations extend from a common loop end.
Claim 16
Dependent Claim
54 words
An expandable stent in the form of a generally tubular body formed of interconnected spiral elements, each spiral element comprising a plurality of connector elements which are spiraled about a center, each connector element spiraled in excess of a quarter revolution about the center, each spiral element formed of at least three connector elements.
Claim 17
Dependent Claim
54 words
An expandable stent in the form of a generally tubular body formed of interconnected spiral elements, each spiral element comprising a plurality of connector elements which are spiraled about a center, each connector element spiraled in excess of a quarter revolution about the center, each spiral element formed of at least three connector elements.
Claim 18
Dependent Claim
75 words
An expandable stent in the form of a generally tubular body formed of interconnected spiral elements, each spiral element comprising a plurality of connector elements which are spiraled about a center, each connector element spiraled in excess of a quarter revolution about the center, the stent further comprising expandable segments of annular serpentine configuration forming a plurality of loops having ends, each spiral element having at least two connector elements connected to adjacent expandable segments.
Claim 19
Dependent Claim
75 words
An expandable stent in the form of a generally tubular body formed of interconnected spiral elements, each spiral element comprising a plurality of connector elements which are spiraled about a center, each connector element spiraled in excess of a quarter revolution about the center, the stent further comprising expandable segments of annular serpentine configuration forming a plurality of loops having ends, each spiral element having at least two connector elements connected to adjacent expandable segments.
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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) | 2003-03-07 | 2003-09-06 | 2004-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-03-07 | 2007-09-06 | 2008-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-03-07 | 2011-09-06 | 2012-03-07 | $7700.00 | Window Closed / Lapsed |