Patent US2359021A successfully refreshed from Google Patents.
US5514154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable stents
Assignee: Abbott Cardiovascular Systems Inc
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Filing: 1994-07-28
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Granted: 1996-05-07
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Expires: 2014-07-28
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 stent.
Inventors
- 👤 Lilip Lau
- 👤 William M. Hartigan
- 👤 John J. Frantzen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:53
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: 26
Claim 1
Independent Claim
112 words
A longitudinally flexible stent for implanting in a body lumen, comprising: a plurality of cylindrical elements which are independently expandable in the radial direction and which are interconnected so as to be generally aligned on a common longitudinal axis; a plurality of connecting elements for interconnecting said cylindrical elements, said connecting elements configured to interconnect only said cylindrical elements that are adjacent to each other; and an outer wall surface on said cylindrical elements, said outer wall surface being smooth prior to expansion of said stent and forming a plurality of outwardly projecting edges which form as said stent is expanded radially outwardly from a first diameter to a second, enlarged diameter.
Claim 2
Dependent Claim
112 words
A longitudinally flexible stent for implanting in a body lumen, comprising: a plurality of cylindrical elements which are independently expandable in the radial direction and which are interconnected so as to be generally aligned on a common longitudinal axis; a plurality of connecting elements for interconnecting said cylindrical elements, said connecting elements configured to interconnect only said cylindrical elements that are adjacent to each other; and an outer wall surface on said cylindrical elements, said outer wall surface being smooth prior to expansion of said stent and forming a plurality of outwardly projecting edges which form as said stent is expanded radially outwardly from a first diameter to a second, enlarged diameter.
Claim 3
Dependent Claim
44 words
The stent of claim 1, wherein said outer wall surface is substantially smooth when said stent in said first diameter configuration and said outwardly projecting edges form only as said stent is expanded radially outwardly from said first diameter to said second, enlarged diameter.
Claim 4
Dependent Claim
42 words
The stent of claim 1, wherein said plurality of outwardly projecting edges extend radially outwardly from said outer wall surface and embed in the vascular wall of the body lumen in order to more firmly attach said stent to the vascular wall.
Claim 5
Dependent Claim
22 words
The stent of claim 1, wherein said plurality of cylindrical elements include a plurality of peaks and valleys having a serpentine pattern.
Claim 6
Dependent Claim
43 words
The stent of claim 4, wherein said plurality of peaks and valleys include a plurality of U-shaped members, a plurality of Y-shaped members, and a plurality of W-shaped members, whereby a portion of said Y-shaped members forms said plurality of said connecting elements.
Claim 7
Dependent Claim
31 words
The stent of claim 5, wherein at least some of said plurality of said U-shaped members tip radially outwardly to form said outwardly projecting edges upon radial expansion of said stent.
Claim 8
Dependent Claim
33 words
The stent of claim 5, wherein at least some of said plurality of U-shaped, W-shaped, and Y-shaped members tip radially outwardly to form said outwardly projecting edges upon radial expansion of said stent.
Claim 9
Dependent Claim
20 words
The stent of claim 1, wherein said cylindrical elements are capable of retaining their expanded condition upon the expansion thereof.
Claim 10
Dependent Claim
30 words
The stent of claim 1, wherein said stent is formed of a biocompatible material selected from the group of materials consisting of stainless steel, tantalum, NiTi alloys, and thermoplastic polymers.
Claim 11
Dependent Claim
16 words
The stent of claim 1, wherein said stent is formed from a single piece of tubing.
Claim 12
Dependent Claim
14 words
The stent of claim 1, wherein said stent is coated with a biocompatible coating.
Claim 13
Dependent Claim
77 words
A longitudinally flexible stent, comprising: a plurality of cylindrical elements which are independently expandable in the radial direction and which are interconnected so as to be concentrically aligned on a common longitudinal axis; and a plurality of generally parallel connecting elements for interconnecting said cylindrical elements, said connecting elements configured to interconnect only said cylindrical elements that are adjacent to each other, so that said stent, when expanded radially outwardly, retains its overall length without appreciable shortening.
Claim 14
Dependent Claim
77 words
A longitudinally flexible stent, comprising: a plurality of cylindrical elements which are independently expandable in the radial direction and which are interconnected so as to be concentrically aligned on a common longitudinal axis; and a plurality of generally parallel connecting elements for interconnecting said cylindrical elements, said connecting elements configured to interconnect only said cylindrical elements that are adjacent to each other, so that said stent, when expanded radially outwardly, retains its overall length without appreciable shortening.
Claim 15
Dependent Claim
20 words
The stent of claim 12, wherein said cylindrical elements are capable of retaining their expanded condition upon the expansion thereof.
Claim 16
Dependent Claim
23 words
The stent of claim 12, wherein said radially expandable cylindrical elements in an expanded condition have a length less than the diameter thereof.
Claim 17
Dependent Claim
29 words
The stent of claim 14, wherein said stent is formed of a biocompatible material selected from the group consisting of stainless steel, tantalum, super-elastic NiTi alloys, and thermoplastic polymers.
Claim 18
Dependent Claim
17 words
The stent of claim 12, wherein said connecting elements between adjacent cylindrical elements are in axial alignment.
Claim 19
Dependent Claim
22 words
The stent of claim 12, wherein said connecting elements between adjacent cylindrical elements are circumferentially displaced with respect to said longitudinal axis.
Claim 20
Dependent Claim
19 words
The stent of claim 17, wherein the circumferential displacement of said connecting elements between adjacent cylindrical elements is uniform.
Claim 21
Dependent Claim
22 words
The stent of claim 12, wherein there are up to four of said connecting elements disposed between adjacent radially expandable cylindrical elements.
Claim 22
Dependent Claim
21 words
The stent of claim 12, wherein said radially expandable cylindrical elements and said connecting elements are made of the same material.
Claim 23
Dependent Claim
16 words
The stent of claim 12, wherein said stent is formed from a single piece of tubing.
Claim 24
Dependent Claim
14 words
The stent of claim 12, wherein the stent is coated with a biocompatible coating.
Claim 25
Dependent Claim
120 words
A longitudinally flexible stent for implanting in a body lumen, comprising: a plurality of cylindrical elements which are independently expandable in the radial direction and which are interconnected so as to be generally aligned on a common longitudinal axis; a plurality of connecting elements for interconnecting said cylindrical elements, said connecting elements configured to interconnect only said cylindrical elements that are adjacent to each other; an outer wall surface on said cylindrical elements, said outer wall surface having a plurality of outwardly projecting edges which form as said stent is expanded radially outwardly from a first diameter to a second, enlarged diameter, whereby said stent does not substantially shorten upon expansion from said first diameter to said second, larger diameter.
Claim 26
Dependent Claim
120 words
A longitudinally flexible stent for implanting in a body lumen, comprising: a plurality of cylindrical elements which are independently expandable in the radial direction and which are interconnected so as to be generally aligned on a common longitudinal axis; a plurality of connecting elements for interconnecting said cylindrical elements, said connecting elements configured to interconnect only said cylindrical elements that are adjacent to each other; an outer wall surface on said cylindrical elements, said outer wall surface having a plurality of outwardly projecting edges which form as said stent is expanded radially outwardly from a first diameter to a second, enlarged diameter, whereby said stent does not substantially shorten upon expansion from said first diameter to said second, larger diameter.
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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) | 1999-05-07 | 1999-11-06 | 2000-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-05-07 | 2003-11-06 | 2004-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-05-07 | 2007-11-06 | 2008-05-07 | $7700.00 | Window Closed / Lapsed |