US5135536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endovascular stent and method
Assignee: Cordis Corp
•
Filing: 1991-02-05
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Granted: 1992-08-04
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Expires: 2011-02-05
Abstract
Abstract A stent for reinforcing a vessel wall is disclosed. The stent is constructed from a single elongated wire. The wire is first bent into a series of tight bends. The wire is then rolled around a mandrel to create junctions of wire which are permanently adhered. The completed stent forms a cylindrical form which can be expanded from an initial diameter to a larger implanted diameter by application of a radially outward force from a balloon catheter or the like.
Inventors
- 👤 Richard A. Hillstead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:40
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2220/00; A61F2220/0008; A61F2220/0025; A61F2220/0058; A61F2220/0075
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
69 words
A stent for placement within a subject vessel comprising a support dimensioned to fit within an interior of said subject vessel including an elongated flexible filament having a plurality of transverse portions each defined by a series of at least three bends, said transverse portions being rolled to create a cylindrical shape having closely spaced filament portions permanently adhered together to form junctions that prevent unrolling of said filament.
Claim 2
Dependent Claim
69 words
A stent for placement within a subject vessel comprising a support dimensioned to fit within an interior of said subject vessel including an elongated flexible filament having a plurality of transverse portions each defined by a series of at least three bends, said transverse portions being rolled to create a cylindrical shape having closely spaced filament portions permanently adhered together to form junctions that prevent unrolling of said filament.
Claim 3
Dependent Claim
10 words
The stent of claim 1 wherein said junctions are welded.
Claim 4
Dependent Claim
10 words
The stent of claim 1 wherein said junctions are soldered.
Claim 5
Dependent Claim
40 words
The stent of claim 1 wherein said stent is radially expandable from a first outer diameter which fits within said vessel to a second increased diameter which contacts an inner wall surface of said vessel to reinforce said inner wall.
Claim 6
Dependent Claim
32 words
The stent of claim 1 wherein an inner diameter of said stent is dimensioned to frictionally engage a noninflated balloon catheter and be carried by said noninflated catheter into a blood vessel.
Claim 7
Dependent Claim
40 words
The stent of claim 1 wherein said junctions are regularly spaced along a length portion of said stent and are permanently adhered and aligned along said length portion of said stent to form a relatively straight backbone to said stent.
Claim 8
Dependent Claim
35 words
The stent of claim 6 wherein gaps are left along said length portion of said stent to accommodate branches in said vessel so that said stent does not block off fluid flow through said branches.
Claim 9
Dependent Claim
67 words
A stent for placement within a subject vessel comprising a support dimensioned to fit within an interior of said subject vessel including an elongated flexible filament defining a series of bends extending along a series of transverse portions that are rolled to create a cylindrical shape having closely spaced filament portions permanently adhered together by tying or suturing to form junctions that prevent unrolling of said filament.
Claim 10
Dependent Claim
67 words
A stent for placement within a subject vessel comprising a support dimensioned to fit within an interior of said subject vessel including an elongated flexible filament defining a series of bends extending along a series of transverse portions that are rolled to create a cylindrical shape having closely spaced filament portions permanently adhered together by tying or suturing to form junctions that prevent unrolling of said filament.
Claim 11
Dependent Claim
70 words
A stent for placement within a subject vessel comprising a support dimensioned to fit within an interior of said subject vessel including an elongated flexible filament defining a series of bends extending along a series of transverse portions that are rolled to create a cylindrical shape having closely spaced filament portions adhered together by tying or suturing with a biodegradable material to form junctions that prevent unrolling of said filament.
Claim 12
Dependent Claim
70 words
A stent for placement within a subject vessel comprising a support dimensioned to fit within an interior of said subject vessel including an elongated flexible filament defining a series of bends extending along a series of transverse portions that are rolled to create a cylindrical shape having closely spaced filament portions adhered together by tying or suturing with a biodegradable material to form junctions that prevent unrolling of said filament.
Claim 13
Dependent Claim
167 words
A stent for placement within a subject vessel comprising a support dimensioned to fit within an interior of said subject vessel including an elongated flexible filament defining a series of transverse portions, each transverse portion defining a series of at least three bends, said transverse portions being rolled to create a cylindrical shape having closely spaced filament portions to form junctions that prevent unrolling of said filament, wherein: a) said junctions are regularly spaced along a length portion of said stent and are permanently adhered together and aligned along said length portion of said stent to form a relatively straight backbone to said stent; b) said stent is radially expandable from a first outer diameter which fits within said vessel to a second increased diameter which contacts an inner wall surface of said vessel to reinforce said inner wall; and, c) an inner diameter of said stent is dimensioned to frictionally engage a non-inflated balloon catheter and be carried by said non-inflated catheter into a blood vessel.
Claim 14
Dependent Claim
167 words
A stent for placement within a subject vessel comprising a support dimensioned to fit within an interior of said subject vessel including an elongated flexible filament defining a series of transverse portions, each transverse portion defining a series of at least three bends, said transverse portions being rolled to create a cylindrical shape having closely spaced filament portions to form junctions that prevent unrolling of said filament, wherein: a) said junctions are regularly spaced along a length portion of said stent and are permanently adhered together and aligned along said length portion of said stent to form a relatively straight backbone to said stent; b) said stent is radially expandable from a first outer diameter which fits within said vessel to a second increased diameter which contacts an inner wall surface of said vessel to reinforce said inner wall; and, c) an inner diameter of said stent is dimensioned to frictionally engage a non-inflated balloon catheter and be carried by said non-inflated catheter into a blood vessel.
Claim 15
Dependent Claim
10 words
The stent of claim 10 wherein said junctions are welded.
Claim 16
Dependent Claim
10 words
The stent of claim 10 wherein said junctions are soldered.
Claim 17
Dependent Claim
35 words
The stent of claim 10 wherein gaps are left along said length portion of said stent to accommodate branches in said vessel so that said stent does not block off fluid flow through said branches.
Claim 18
Dependent Claim
165 words
A stent for placement within a subject vessel comprising a support dimensioned to fit within an interior of said subject vessel including an elongated flexible filament defining a series of bends extending along a series of transverse portions that are rolled to create a cylindrical shape having closely spaced filament portions to form junctions that prevent unrolling of said filament, wherein: a) said junctions are regularly spaced along a length portion of said stent and are permanently adhered together by tying or suturing and are aligned along said length portion of said stent to form a relatively straight backbone to said stent; b) said stent is radially expandable from a first outer diameter which fits within said vessel to a second increased diameter which contacts an inner wall surface of said vessel to reinforce said inner wall; and, c) an inner diameter of said stent is dimensioned to frictionally engage a non-inflated balloon catheter and be carried by said non-inflated catheter into a blood vessel.
Claim 19
Dependent Claim
165 words
A stent for placement within a subject vessel comprising a support dimensioned to fit within an interior of said subject vessel including an elongated flexible filament defining a series of bends extending along a series of transverse portions that are rolled to create a cylindrical shape having closely spaced filament portions to form junctions that prevent unrolling of said filament, wherein: a) said junctions are regularly spaced along a length portion of said stent and are permanently adhered together by tying or suturing and are aligned along said length portion of said stent to form a relatively straight backbone to said stent; b) said stent is radially expandable from a first outer diameter which fits within said vessel to a second increased diameter which contacts an inner wall surface of said vessel to reinforce said inner wall; and, c) an inner diameter of said stent is dimensioned to frictionally engage a non-inflated balloon catheter and be carried by said non-inflated catheter into a blood vessel.
Claim 20
Dependent Claim
168 words
A stent for placement within a subject vessel comprising a support dimensioned to fit within an interior of said subject vessel including an elongated flexible filament defining a series of bends extending along a series of transverse portions that are rolled to create a cylindrical shape having closely spaced filament portions to form junctions that prevent unrolling of said filament, wherein: a) said junctions are regularly spaced along a length portion of said stent and are adhered together by tying or suturing with a biodegradable material and are aligned along said length portion of said stent to form a relatively straight backbone to said stent; b) said stent is radially expandable from a first outer diameter which fits within said vessel to a second increased diameter which contacts an inner wall surface of said vessel to reinforce said inner wall; and, c) an inner diameter of said stent is dimensioned to frictionally engage a non-inflated balloon catheter and be carried by said non-inflated catheter into a blood vessel.
Claim 21
Dependent Claim
168 words
A stent for placement within a subject vessel comprising a support dimensioned to fit within an interior of said subject vessel including an elongated flexible filament defining a series of bends extending along a series of transverse portions that are rolled to create a cylindrical shape having closely spaced filament portions to form junctions that prevent unrolling of said filament, wherein: a) said junctions are regularly spaced along a length portion of said stent and are adhered together by tying or suturing with a biodegradable material and are aligned along said length portion of said stent to form a relatively straight backbone to said stent; b) said stent is radially expandable from a first outer diameter which fits within said vessel to a second increased diameter which contacts an inner wall surface of said vessel to reinforce said inner wall; and, c) an inner diameter of said stent is dimensioned to frictionally engage a non-inflated balloon catheter and be carried by said non-inflated catheter into a blood vessel.
Claim 22
Independent Claim
134 words
A method of fabricating a generally cylindrical stent, said method comprising: a) bending an elongated filament into a plurality of series of relatively tight bends; b) bending said filament into a plurality of transverse portions, each transverse portion having at least three of the relatively tight bends; c) providing a cylindrical mandrel of a dimension smaller than an inner diameter of a vessel into which said stent is to be inserted; d) rolling said filament around said mandrel such that ends of said transverse portions meet locations of adjacent filament portions thereby creating said cylindrical shape; e) permanently adhering said ends and locations to create junctions of filament; and f) removing said filament from said mandrel to define a throughpassage for fluid passage through said stent in a region previously occupied by said mandrel.
Claim 23
Independent Claim
134 words
A method of fabricating a generally cylindrical stent, said method comprising: a) bending an elongated filament into a plurality of series of relatively tight bends; b) bending said filament into a plurality of transverse portions, each transverse portion having at least three of the relatively tight bends; c) providing a cylindrical mandrel of a dimension smaller than an inner diameter of a vessel into which said stent is to be inserted; d) rolling said filament around said mandrel such that ends of said transverse portions meet locations of adjacent filament portions thereby creating said cylindrical shape; e) permanently adhering said ends and locations to create junctions of filament; and f) removing said filament from said mandrel to define a throughpassage for fluid passage through said stent in a region previously occupied by said mandrel.
Claim 24
Dependent Claim
13 words
The method of claim 16 wherein said junctions are permanently adhered by welding.
Claim 25
Dependent Claim
13 words
The method of claim 16 wherein said junctions are permanently adhered by soldering.
Claim 26
Dependent Claim
50 words
The method of claim 16 wherein subsequent to said removal of said stent from said mandrel, one or more transverse portions are removed from said stent to create gaps to accommodate branching vessels and allow unimpeded fluid flow to said branching vessels after said stent is positioned within said vessel.
Claim 27
Independent Claim
134 words
A method of fabricating a generally cylindrical stent, said method comprising: a) bending an elongated filament into a plurality of series of relatively tight bends; b) providing a cylindrical mandrel of a dimension smaller than an inner diameter of a vessel into which said stent is to be inserted; c) rolling said filament around said mandrel to create junctions of filament thereby creating said cylindrical shape; d) permanently adhering said junctions of filament; e) removing said filament from said mandrel to define a throughpassage for fluid passage through said stent in a region previously occupied by said mandrel; and, f) removing one or more sections of filament from said stent to create gaps to accommodate branching vessels and allow unimpeded fluid flow to said branching vessels after said stent is positioned within said vessel.
Claim 28
Independent Claim
134 words
A method of fabricating a generally cylindrical stent, said method comprising: a) bending an elongated filament into a plurality of series of relatively tight bends; b) providing a cylindrical mandrel of a dimension smaller than an inner diameter of a vessel into which said stent is to be inserted; c) rolling said filament around said mandrel to create junctions of filament thereby creating said cylindrical shape; d) permanently adhering said junctions of filament; e) removing said filament from said mandrel to define a throughpassage for fluid passage through said stent in a region previously occupied by said mandrel; and, f) removing one or more sections of filament from said stent to create gaps to accommodate branching vessels and allow unimpeded fluid flow to said branching vessels after said stent is positioned within said vessel.
Claim 29
Independent Claim
102 words
A method of fabricating a generally cylindrical stent, said method comprising: a) bending an elongated filament into a plurality of series of relatively tight bends; b) providing a cylindrical mandrel of a dimension smaller than an inner diameter of a vessel into which said stent is to be inserted; c) rolling said filament around said mandrel to create junctions of filaments thereby creating said cylindrical shape; d) permanently adhering said junctions of filament by tying or suturing; e) removing said filament from said mandrel to define a throughpassage for fluid passage through said stent in a region previously occupied by said mandrel.
Claim 30
Independent Claim
102 words
A method of fabricating a generally cylindrical stent, said method comprising: a) bending an elongated filament into a plurality of series of relatively tight bends; b) providing a cylindrical mandrel of a dimension smaller than an inner diameter of a vessel into which said stent is to be inserted; c) rolling said filament around said mandrel to create junctions of filaments thereby creating said cylindrical shape; d) permanently adhering said junctions of filament by tying or suturing; e) removing said filament from said mandrel to define a throughpassage for fluid passage through said stent in a region previously occupied by said mandrel.
Claim 31
Independent Claim
105 words
A method of fabricating a generally cylindrical stent, said method comprising: a) bending an elongated filament into a plurality of series of relatively tight bends; b) providing a cylindrical mandrel of a dimension smaller than an inner diameter of a vessel into which said stent is to be inserted; c) rolling said filament around said mandrel to create junctions of filament thereby creating said cylindrical shape; d) adhering said junctions of filament by tying or suturing with a biodegradable material; e) removing said filament from said mandrel to define a throughpassage for fluid passage through said stent in a region previously occupied by said mandrel.
Claim 32
Independent Claim
105 words
A method of fabricating a generally cylindrical stent, said method comprising: a) bending an elongated filament into a plurality of series of relatively tight bends; b) providing a cylindrical mandrel of a dimension smaller than an inner diameter of a vessel into which said stent is to be inserted; c) rolling said filament around said mandrel to create junctions of filament thereby creating said cylindrical shape; d) adhering said junctions of filament by tying or suturing with a biodegradable material; e) removing said filament from said mandrel to define a throughpassage for fluid passage through said stent in a region previously occupied by said mandrel.
Claim 33
Dependent Claim
104 words
A stent for reinforcing a vessel within a subject comprising a cylindrical support dimensioned to fit within an interior of said vessel including: a) an elongated filament bent to define segments of relatively tightly spaced bends which form a plurality of loops spaced along an axial dimension of the stent connected by a plurality of generally straight wire segments; and, b) means for connecting together different straight wire segments; wherein said stent is radially expandable from a first outer diameter which fits within said vessel to a second increased diameter which contacts an inner wall surface of said vessel to reinforce said inner wall.
Claim 34
Dependent Claim
104 words
A stent for reinforcing a vessel within a subject comprising a cylindrical support dimensioned to fit within an interior of said vessel including: a) an elongated filament bent to define segments of relatively tightly spaced bends which form a plurality of loops spaced along an axial dimension of the stent connected by a plurality of generally straight wire segments; and, b) means for connecting together different straight wire segments; wherein said stent is radially expandable from a first outer diameter which fits within said vessel to a second increased diameter which contacts an inner wall surface of said vessel to reinforce said inner wall.
Claim 35
Dependent Claim
56 words
A stent for reinforcing a vessel comprising a wire having alternating bent and straight portions wherein the bent portions form cicumferential loops about a stent throughpassage to bring alternate straight line portions into contact at aligned locations along a length of the stent, and means for connecting at least some of said straight portion locations together.
Claim 36
Dependent Claim
56 words
A stent for reinforcing a vessel comprising a wire having alternating bent and straight portions wherein the bent portions form cicumferential loops about a stent throughpassage to bring alternate straight line portions into contact at aligned locations along a length of the stent, and means for connecting at least some of said straight portion locations together.
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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) | 1995-08-04 | 1996-02-03 | 1996-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-04 | 2000-02-03 | 2000-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-04 | 2004-02-03 | 2004-08-04 | $7700.00 | Window Closed / Lapsed |