US5735893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable stents and method for making same
Assignee: Abbott Cardiovascular Systems Inc
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Filing: 1997-01-14
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Granted: 1998-04-07
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Expires: 2017-01-14
Abstract
Abstract The invention is directed to an expandable stent for implantation in a body lumen, such as an artery, and a method for making it from a single length of tubing. The stent consists of a plurality of radially expandable cylindrical elements generally aligned on a common axis and interconnected by one or more interconnective elements. The individual radially expandable cylindrical elements consist of ribbon-like material disposed in an undulating pattern. Portions of the expanded stent project outwardly into engagement with the vessel wall to more securely attach the dtent.
Inventors
- 👤 Lilip Lau
- 👤 William M. Hartigan
- 👤 John J. Frantzen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:05
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/88; A61F2/89; A61F2/90; A61F2/91; A61F2/915; C; C23; C23F; C23F1/00; C23F1/02; C23F1/04; A61F2/848; A61F2/95; A61F2/958; A61F2002/91533; A61F2002/9155; A61F2002/91558; A61F2002/91575; A61F2210/00; A61F2210/0014; A61F2210/0019; A61M; A61M25/00; A61M25/10; A61M2025/1043; A61M2025/1081; Y; Y10; Y10S; Y10S623/00; Y10S623/901; Y10S623/902; Y10S623/903; Y10S623/92; Y10S623/921; Y10T; Y10T29/00; Y10T29/49; Y10T29/49995
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
119 words
An intravascular stent for expanding and implanting in a body lumen, comprising: a plurality of spaced apart cylindrical rings positioned along a longitudinal axis, each of the cylindrical rings having a plurality of undulating elements in the form of a repeating pattern of substantially U-shaped members; and a plurality of connecting members for connecting adjacent cylindrical rings; and the cylindrical rings being positioned relative to each other so that the substantially U-shaped members of adjacent cylindrical rings are out of phase; the cylindrical rings having a delivery diameter and an implanted diameter so that as the cylindrical rings are expanded from the delivery diameter to the implanted diameter at lest some of the substantially U-shaped members project radially outwardly.
Claim 2
Dependent Claim
119 words
An intravascular stent for expanding and implanting in a body lumen, comprising: a plurality of spaced apart cylindrical rings positioned along a longitudinal axis, each of the cylindrical rings having a plurality of undulating elements in the form of a repeating pattern of substantially U-shaped members; and a plurality of connecting members for connecting adjacent cylindrical rings; and the cylindrical rings being positioned relative to each other so that the substantially U-shaped members of adjacent cylindrical rings are out of phase; the cylindrical rings having a delivery diameter and an implanted diameter so that as the cylindrical rings are expanded from the delivery diameter to the implanted diameter at lest some of the substantially U-shaped members project radially outwardly.
Claim 3
Dependent Claim
20 words
The intravascular stent of claim 1, wherein at least some of the connecting members are substantially parallel to each other.
Claim 4
Dependent Claim
22 words
The intravascular stent of claim 1, wherein the cylindrical rings and connecting members are formed from a single piece of hollow tubing.
Claim 5
Dependent Claim
22 words
The intravascular stent of claim 1, wherein the substantially U-shaped members have a curved portion having a substantially uniform radius of curvature.
Claim 6
Dependent Claim
51 words
The intravascular stent of claim 4, wherein at least some of the curved portions of the substantially U-shaped members deform when the stent is expanded from the delivery diameter, to the larger implanted diameter, the deformed curved portions projecting radially outwardly as the stent is expanded to the larger implanted diameter.
Claim 7
Dependent Claim
54 words
The intravascular stent of claim 5, wherein the stent has a first end and a second end, at least some of the curved portions of the substantially U-shaped members forming the first end and the second end project radially outwardly when the stent is expanded from the delivery diameter to the larger implanted diameter.
Claim 8
Dependent Claim
22 words
The intravascular stent of claim 1, wherein the cylindrical elements and the connecting members are formed from a flat sheet of material.
Claim 9
Dependent Claim
15 words
The intravascular stent of claim 1, wherein the stent is formed from a metal alloy.
Claim 10
Dependent Claim
23 words
The intravascular stent of claim 8, wherein the metal alloy is taken from the group of metal alloys comprising stainless steel and nickel-titanium.
Claim 11
Dependent Claim
19 words
The intravascular stent of claim 1, wherein the connecting members between adjacent cylindrical elements are substantially the same length.
Claim 12
Dependent Claim
19 words
The intravascular stent of claim 1, wherein the plurality of U-shaped members have substantially the same size and shape.
Claim 13
Dependent Claim
14 words
The intravascular stent of claim 1, wherein at least five cylindrical elements are interconnected.
Claim 14
Dependent Claim
132 words
An intravascular stent for expanding and implanting in a body lumen, comprising: a plurality of spaced-apart cylindrical rings positioned along a longitudinal axis, each of the cylindrical rings having a plurality of undulating elements in the form of a repeating pattern of substantially U-shaped members; each of the substantially U-shaped members having a pair of sides connected by a curved portion; a plurality of struts for connecting adjacent cylindrical rings; and the cylindrical rings being positioned relative to each other so that the substantially U-shaped members of adjacent cylindrical rings are out of phase; the cylindrical rings having a delivery diameter and an implanted diameter so that as the cylindrical rings are expanded from the delivery diameter to the implanted diameter at lest some of the substantially U-shaped members project radially outwardly.
Claim 15
Dependent Claim
132 words
An intravascular stent for expanding and implanting in a body lumen, comprising: a plurality of spaced-apart cylindrical rings positioned along a longitudinal axis, each of the cylindrical rings having a plurality of undulating elements in the form of a repeating pattern of substantially U-shaped members; each of the substantially U-shaped members having a pair of sides connected by a curved portion; a plurality of struts for connecting adjacent cylindrical rings; and the cylindrical rings being positioned relative to each other so that the substantially U-shaped members of adjacent cylindrical rings are out of phase; the cylindrical rings having a delivery diameter and an implanted diameter so that as the cylindrical rings are expanded from the delivery diameter to the implanted diameter at lest some of the substantially U-shaped members project radially outwardly.
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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) | 2001-04-06 | 2001-10-06 | 2002-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-06 | 2005-10-06 | 2006-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-06 | 2009-10-06 | 2010-04-07 | $7700.00 | Window Closed / Lapsed |