US4886062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intravascular radially expandable stent and method of implant
Assignee: Medtronic Inc
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Filing: 1987-10-19
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Granted: 1989-12-12
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Expires: 2007-10-19
Abstract
Abstract A device to be used as a vascular stent comprising a cylindrical open-ended wire component made of a low memory metal such as copper alloy, titanium, or gold, providing a radial support from within a blood vessel after implantation therein. The coronary stent is characterized by its ability to be expanded radially to a larger diameter after initial implantation and means for causing said stent to expand to a larger diameter and a method for transporting, positioning and implantation of such coronary stent transluminarely to have said stent act as a permanent prosthesis to assure vascular patency. And method for simultaneous angioplasty and stent implant procedure.
Inventors
- 👤 Dominik M. Wiktor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:13
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/88; B; B21; B21F; B21F45/00; B21F45/008; A61F2/95; A61F2/958; A61F2002/825; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00035; A61F2310/00077; A61F2310/00155
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
58 words
A radially expandable stent for implantation within a body vessel, comprising a wire formed winding in a hollow cylindrical shape, the winding including a preformed zig-zag type pattern continuous wire formed flat band, the flat band wound into a continuous helix the length of the stent, and a full loop terminating both ends of zig-zag preformed wire band.
Claim 2
Dependent Claim
58 words
A radially expandable stent for implantation within a body vessel, comprising a wire formed winding in a hollow cylindrical shape, the winding including a preformed zig-zag type pattern continuous wire formed flat band, the flat band wound into a continuous helix the length of the stent, and a full loop terminating both ends of zig-zag preformed wire band.
Claim 3
Dependent Claim
19 words
A stent as defined in claim 1 wherein the unexpanded stent has an outside diameter less then 0.075 inch.
Claim 4
Dependent Claim
20 words
A stent as defined in claim 2 wherein the stent is radially expandable to approximately three times its original diameter.
Claim 5
Dependent Claim
19 words
A stent as defined in claim 1 in combination with means within the wire winding for expanding the winding.
Claim 6
Dependent Claim
71 words
A radially-expandable stent for implantation within a body vessel comprising: a stent body having a wall of generally cylindrical shape formed of a helical coil made of a wire, the body having a longitudinal axis and a first diameter; zig-zag means in the wire for allowing radial expansion of the cylindrical stent body from the first diameter to a second larger diameter without significantly altering body length along the longitudinal axis.
Claim 7
Dependent Claim
71 words
A radially-expandable stent for implantation within a body vessel comprising: a stent body having a wall of generally cylindrical shape formed of a helical coil made of a wire, the body having a longitudinal axis and a first diameter; zig-zag means in the wire for allowing radial expansion of the cylindrical stent body from the first diameter to a second larger diameter without significantly altering body length along the longitudinal axis.
Claim 8
Dependent Claim
17 words
The stent of claim 5 wherein the zig-zag pattern is a generally sinusoidal bend in the wire.
Claim 9
Dependent Claim
19 words
The stent of claim 6 wherein the sinusoidal bend lies generally within the cylindrical shape of the stent wall.
Claim 10
Dependent Claim
15 words
The stent of claim 5 wherein the wire has an end formed in a loop.
Claim 11
Independent Claim
31 words
A method of forming a radially-expandable stent for implantation within a body vessel comprising: bending a wire in a zig-zag pattern; and winding the wire around a form in a coil.
Claim 12
Independent Claim
31 words
A method of forming a radially-expandable stent for implantation within a body vessel comprising: bending a wire in a zig-zag pattern; and winding the wire around a form in a coil.
Claim 13
Dependent Claim
39 words
The method of claim 9 wherein the step of bending includes forming the zig-zag pattern in the wire generally in a plane and the step of winding the wire includes winding with the zig-zag pattern flat against the form.
Claim 14
Dependent Claim
16 words
The method of claim 9 further comprising: forming a loop in an end of the wire.
Claim 15
Independent Claim
57 words
A method of forming a radially-expandable stent for implantation within a body vessel comprising: forming a wire into a sinusoidal shape; forming the wire into a coil having a first diameter and a first longitudinal length, so that later radial outward deformation of the cylinder to a second larger diameter does not significantly alter the longitudinal length.
Claim 16
Independent Claim
57 words
A method of forming a radially-expandable stent for implantation within a body vessel comprising: forming a wire into a sinusoidal shape; forming the wire into a coil having a first diameter and a first longitudinal length, so that later radial outward deformation of the cylinder to a second larger diameter does not significantly alter the longitudinal length.
Claim 17
Dependent Claim
75 words
A stent for implantation within a body vessel comprising: a cylindrical stent body formed of a continwous wire, the stent body having a first diameter and a first length along a longitudinal axis, the wire lying generally at an acute angle to a line through the cylindrical body parallel to the longitudinal axis; and zig-zag means in the wire for allowing radial outward expansion of the body without significantly altering the length of the body.
Claim 18
Dependent Claim
75 words
A stent for implantation within a body vessel comprising: a cylindrical stent body formed of a continwous wire, the stent body having a first diameter and a first length along a longitudinal axis, the wire lying generally at an acute angle to a line through the cylindrical body parallel to the longitudinal axis; and zig-zag means in the wire for allowing radial outward expansion of the body without significantly altering the length of the body.
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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) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |