Patent DE2919009A1 successfully refreshed from Google Patents.
US6290721B1
Expired / Lapsed
US
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Tubular medical endoprostheses
Assignee: Boston Scientific Scimed Inc
•
Filing: 1997-10-21
•
Granted: 2001-09-18
•
Expires: 2017-10-21
Abstract
Abstract A tubular prosthesis device for use within the body. The device includes, a metal filament material formed of metal outer member having an exposed outer surface and a core within the extended outer member formed of a different metal than the outer member. The core is secured within and substantially enclosed by the outer member. The device can be reduced to a small size for introduction into the body lumen and expandable to a sufficiently large size to engage the wall of the body lumen. Stents formed of composite wires are shown.
Inventors
- 👤 Kevin R. Heath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:44
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61B; A61B90/00; A61B90/39; A61L; A61L31/00; A61L31/02; A61L31/022; A61L31/08; A61L31/082; A61L31/088; A61L31/14; A61L31/18; A61M; A61M25/00; A61M25/01; A61M25/0105; A61M25/0108; A61F2210/00; A61F2210/0014; A61F2210/0019; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0013; A61F2240/00; A61F2240/001; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0098; A61M25/09; A61M2025/09166
Claims Analysis
Total Claims: 59
Claim 1
Independent Claim
163 words
A tubular prosthesis device for use within the body comprised at least in part of an elongated filament-form metal element adapted to be subjected to elastic deformation to enable the device to be forced into a characteristic deformed configuration during a stage of use and to elastically self-recover from said deformation when deformation forces are relieved, said filament-form metal element comprised of a core of a first metal of a first selected thickness and an intimately surrounding sheath of a second selected metal of a second thickness, said first metal being of a substantially higher radiopacity than that of said second metal, said second metal being substantially more elastic than said first metal, the metals in said filament-form metal element serving to enhance the radiopacity of said filament-form metal element to provide improved fluoroscopic or x-ray visualization of said filament-form metal element in said body while imparting sufficient elasticity to enable the filament-form metal element to elastically self-recover from said characteristic deformed configuration.
Claim 2
Dependent Claim
163 words
A tubular prosthesis device for use within the body comprised at least in part of an elongated filament-form metal element adapted to be subjected to elastic deformation to enable the device to be forced into a characteristic deformed configuration during a stage of use and to elastically self-recover from said deformation when deformation forces are relieved, said filament-form metal element comprised of a core of a first metal of a first selected thickness and an intimately surrounding sheath of a second selected metal of a second thickness, said first metal being of a substantially higher radiopacity than that of said second metal, said second metal being substantially more elastic than said first metal, the metals in said filament-form metal element serving to enhance the radiopacity of said filament-form metal element to provide improved fluoroscopic or x-ray visualization of said filament-form metal element in said body while imparting sufficient elasticity to enable the filament-form metal element to elastically self-recover from said characteristic deformed configuration.
Claim 3
Dependent Claim
17 words
The device of claim 1 , wherein said filament-form metal element is the product produced by draw-forming.
Claim 4
Dependent Claim
12 words
The device of claim 1 , wherein said second metal is nitinol.
Claim 5
Dependent Claim
13 words
The device of claim 3 , wherein said high density metal is tantalum.
Claim 6
Dependent Claim
28 words
The device of claim 1 , wherein said tubular prosthetic device is formed into said tubular shape by knitting into loosely interlocked loops of said filament-form metal element.
Claim 7
Dependent Claim
23 words
The device of claim 1 , wherein the transverse cross-sectional dimension of said filament-form metal element is about no greater than 0.015 inch.
Claim 8
Dependent Claim
37 words
The device of claim 1 , wherein said transverse cross-sectional dimension of said filament-form metal is about 0.0045 to about 0.006 inch and said core has a transverse cross-sectional dimension of about 0.0014 to about 0.00195 inch.
Claim 9
Dependent Claim
18 words
The device of claim 1 , wherein said core has a density of about at least 9.9 g/cc.
Claim 10
Dependent Claim
25 words
The device of claim 8 , wherein said core is selected from the group consisting of tungsten, tantalum, rhenium, iridium, silver, gold, bismuth and platinum.
Claim 11
Dependent Claim
20 words
The device of claim 1 , wherein said outer member is selected from superelastic alloys and precursors of superelastic alloys.
Claim 12
Dependent Claim
12 words
The device of claim 10 , wherein said outer member is nitinol.
Claim 13
Dependent Claim
11 words
The device of claim 11 , wherein said core is tantalum.
Claim 14
Dependent Claim
29 words
The device of claim 1 , wherein a transverse cross-sectional dimension of said core is about 1 to 40% of a transverse cross-sectional dimension of said filament-form metal element.
Claim 15
Dependent Claim
24 words
The device of claim 13 , wherein said core is about 25 to 40% of a transverse cross-sectional dimension of said filament-form metal element.
Claim 16
Dependent Claim
22 words
The device of claim 13 , wherein said core is about 33% of a transverse cross-sectional dimension of said filament-form metal element.
Claim 17
Dependent Claim
21 words
The device of claim 1 , wherein said core has a modulus of elasticity of about no greater than 500 GPa.
Claim 18
Dependent Claim
21 words
The device of claim 1 , wherein said core has a modulus of elasticity of about no greater than 200 GPa.
Claim 19
Dependent Claim
22 words
The device of claim 1 , wherein said filament-form metal element has a transverse cross-sectional dimension of less than about 0.0075 inch.
Claim 20
Dependent Claim
24 words
The device of claim 1 , wherein said filament-form metal element has a transverse cross-sectional dimension of about 0.0045 inch to about 0.006 inch.
Claim 21
Dependent Claim
21 words
The device of claim 1 , wherein said stent device has a diameter of about 4 mm to about 12 mm.
Claim 22
Dependent Claim
21 words
The device of claim 1 , wherein said stent device has a length of about 2 cm to about 8 cm.
Claim 23
Dependent Claim
16 words
The device of claim 1 , wherein said filament-form metal element is in an overlapping pattern.
Claim 24
Dependent Claim
18 words
The device of claim 1 , wherein said stent device is a weave of said filament-form metal element.
Claim 25
Dependent Claim
16 words
The device of claim 1 or 18 - 23 , wherein said first metal is tantalum.
Claim 26
Dependent Claim
193 words
A tubular prosthesis for use within the body comprised at least in part of an elongated filament-form metal element, said filament-form metal element being arranged in an overlapping pattern defining a tube and adapted to be subjected to elastic deformation to enable the device to be forced into a characteristic deformed configuration during a stage of use and to elastically self-recover from said deformation when deformation forces are relieved, said filament-form metal element having transverse cross-sectional dimension of about 0.0075 inch or less and being comprised of a core of a first metal of a first selected thickness and an intimately surrounding sheath of a second selected metal of a second thickness, said first metal being tantalum and having a substantially higher density and demonstrating characteristically substantially higher radiopacity than that of said second metal, said second metal being substantially more elastic than said first metal, the combined effect of said first and second metals in said filament-form metal element to provide improved fluoroscopic or x-ray visualization of said filament-form metal element in said body while imparting sufficient elasticity to enable the filament-form metal element to elastically self-recover from said characteristic deformed configuration.
Claim 27
Dependent Claim
193 words
A tubular prosthesis for use within the body comprised at least in part of an elongated filament-form metal element, said filament-form metal element being arranged in an overlapping pattern defining a tube and adapted to be subjected to elastic deformation to enable the device to be forced into a characteristic deformed configuration during a stage of use and to elastically self-recover from said deformation when deformation forces are relieved, said filament-form metal element having transverse cross-sectional dimension of about 0.0075 inch or less and being comprised of a core of a first metal of a first selected thickness and an intimately surrounding sheath of a second selected metal of a second thickness, said first metal being tantalum and having a substantially higher density and demonstrating characteristically substantially higher radiopacity than that of said second metal, said second metal being substantially more elastic than said first metal, the combined effect of said first and second metals in said filament-form metal element to provide improved fluoroscopic or x-ray visualization of said filament-form metal element in said body while imparting sufficient elasticity to enable the filament-form metal element to elastically self-recover from said characteristic deformed configuration.
Claim 28
Dependent Claim
54 words
An implantable tubular medical stent, comprising: a metal wire composed of multiple metal layers, including a first layer formed of a first metal and a second layer formed of a second metal, the first metal having a greater density than the second metal and the first layer being disposed inwardly of the second layer.
Claim 29
Dependent Claim
54 words
An implantable tubular medical stent, comprising: a metal wire composed of multiple metal layers, including a first layer formed of a first metal and a second layer formed of a second metal, the first metal having a greater density than the second metal and the first layer being disposed inwardly of the second layer.
Claim 30
Dependent Claim
15 words
The implantable tubular stent of claim 26 , wherein the wire is formed by draw-forming.
Claim 31
Dependent Claim
14 words
The implantable tubular stent of claim 26 , wherein the second metal is nitinol.
Claim 32
Dependent Claim
14 words
The implantable tubular stent of claim 28 , wherein the first metal is tantalum.
Claim 33
Dependent Claim
20 words
The implantable tubular stent of claim 26 , wherein the stent is formed by knitting, weaving or crocheting the wire.
Claim 34
Dependent Claim
22 words
The implantable tubular stent of claim 26 , wherein the wire has an overall diameter of no greater than about 0.015 inch.
Claim 35
Dependent Claim
21 words
The implantable tubular stent of claim 26 , wherein the first metal has a density of at least about 9.9 g/cc.
Claim 36
Dependent Claim
29 words
The implantable tubular stent of claim 26 , wherein the first metal is selected from the group consisting of stainless steel, tantalum, rhenium, iridium, silver, gold, bismuth and platinum.
Claim 37
Dependent Claim
28 words
The implantable tubular stent of claim 26 , wherein the second metal is selected from the group consisting of stainless steel, superelastic alloys and precursors of superelastic alloys.
Claim 38
Dependent Claim
14 words
The implantable tubular stent of claim 26 , wherein the second metal is nitinol.
Claim 39
Dependent Claim
14 words
The implantable tubular stent of claim 35 , wherein the first metal is tantalum.
Claim 40
Dependent Claim
26 words
The implantable tubular stent of claim 26 , wherein the core has a diameter of about 1 to 40% of an overall diameter of the wire.
Claim 41
Dependent Claim
33 words
The implantable tubular stent of claim 37 , wherein the wire has an overall diameter of about 0.0045 to 0.006 inch and the core has a diameter of about 0.0014 to 0.00195 inch.
Claim 42
Dependent Claim
26 words
The implantable tubular stent of claim 37 , wherein the core has a diameter of about 25% to 40% of the overall diameter of the wire.
Claim 43
Dependent Claim
21 words
The implantable tubular stent of claim 39 , wherein the core is about 33% of the overall diameter of the wire.
Claim 44
Dependent Claim
24 words
The implantable tubular stent of claim 26 , wherein the first metal has a modulus of elasticity of no greater than about 500 GPa.
Claim 45
Dependent Claim
24 words
The implantable tubular stent of claim 41 , wherein the first metal has a modulus of elasticity of no greater than about 200 GPa.
Claim 46
Dependent Claim
21 words
The implantable tubular stent of claim 26 , wherein the stent has a length in the range of about 2-8 cm.
Claim 47
Dependent Claim
21 words
The implantable tubular stent of claim 43 , wherein the stent has a diameter in the range of about 4-12 mm.
Claim 48
Dependent Claim
66 words
An implantable tubular medical stent, comprising: a metal wire composed of multiple metal layers, including a first layer formed of a first metal and a second layer formed of a second metal, the first metal having a greater density than the second metal and being selected from the group consisting of tantalum, platinum, tungsten and iridium, the first layer being disposed inwardly of the second layer.
Claim 49
Dependent Claim
66 words
An implantable tubular medical stent, comprising: a metal wire composed of multiple metal layers, including a first layer formed of a first metal and a second layer formed of a second metal, the first metal having a greater density than the second metal and being selected from the group consisting of tantalum, platinum, tungsten and iridium, the first layer being disposed inwardly of the second layer.
Claim 50
Dependent Claim
14 words
The implantable tubular stent of claim 45 , wherein the first metal is tantalum.
Claim 51
Dependent Claim
25 words
The implantable tubular stent of claim 45 , wherein the core has a diameter greater than about 1% of an overall diameter of the wire.
Claim 52
Dependent Claim
26 words
The implantable tubular stent of claim 47 , wherein the core has a diameter of about 50% or less of the overall diameter of the wire.
Claim 53
Dependent Claim
28 words
The implantable tubular stent of claim 45 , wherein the second metal is selected from the group consisting of stainless steel, superelastic alloys and precursors of superelastic alloys.
Claim 54
Dependent Claim
28 words
The implantable tubular stent of claim 45 , wherein the stent has a length of about 2-8 cm and a diameter in the range of about 4-12 mm.
Claim 55
Dependent Claim
21 words
The implantable tubular stent of claim 45 , where in the wire has a diameter of about 0.0075 inch or less.
Claim 56
Dependent Claim
21 words
The implantable tubular stent of claim 46 , where in the wire has a diameter of about 0.0075 inch or less.
Claim 57
Dependent Claim
21 words
The implantable tubular stent of claim 47 , where in the wire has a diameter of about 0.0075 inch or less.
Claim 58
Dependent Claim
21 words
The implantable tubular stent of claim 48 , where in the wire has a diameter of about 0.0075 inch or less.
Claim 59
Dependent Claim
21 words
The implantable tubular stent of claim 49 , where in the wire has a diameter of about 0.0075 inch or less.
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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) | 2004-09-17 | 2005-03-19 | 2005-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-09-17 | 2009-03-19 | 2009-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-09-17 | 2013-03-19 | 2013-09-18 | $7700.00 | Window Closed / Lapsed |