EP0804934A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Cobalt-chromium-molybdenum alloy stent and stent-graft
Assignee: Schneider USA Inc
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Filing: 1997-03-27
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Granted: —
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Expires: 2017-03-27
Abstract
Abstract A self-expanding stent (10) formed of helically wound and braided filaments (14) of wrought cobalt, chromium and molybdenum alloy containing less than about five weight percent nickel. The composition of the alloy from which one embodiment of the stent is formed is Co-26Cr-6Mo-1Si-1Fe-1Mn-1Ni.
Inventors
- 👤 Jonathan S. Stinson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 04:03
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61L; A61L31/00; A61L31/02; A61L31/022; A61F2210/00; A61F2210/0076
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
34 words
An implantable medical device comprised of a tubular and radially expandable structure including at least one elongate element formed of cobalt, chromium and molybdenum (Co-Cr-Mo) alloy containing less than about 5 weight percent nickel.
Claim 2
Dependent Claim
27 words
The medical device of claim 1 wherein the device is further comprised of a lattice structure including the at least one elongate element formed of Co-Cr-Mo alloy.
Claim 3
Dependent Claim
28 words
The medical device of claims 1-2 wherein the device is further comprised of a radially self-expanding structure including the at least one elongate element formed of Co-Cr-Mo alloy.
Claim 4
Dependent Claim
33 words
The medical device of claims 1-3 wherein the device further comprises an axially flexible structure including a plurality of the elongate elements formed of Co-Cr-Mo alloy which are interwoven in a braid-like configuration.
Claim 5
Dependent Claim
18 words
The medical device of claims 1-4 wherein the Co-Cr-Mo alloy contains less than about 2 weight percent nickel.
Claim 6
Dependent Claim
19 words
The medical device of claims 1-4 wherein the Co-Cr-Mo alloy contains a maximum of about 1 weight percent nickel.
Claim 7
Dependent Claim
32 words
The medical device of claims 1-6 wherein the Co-Cr-Mo alloy contains between about 0 and about 0.25 weight percent nitrogen (N), and between about 0 and about 0.35 weight percent carbon (C).
Claim 8
Dependent Claim
31 words
The medical device of claims 1-6 wherein the Co-Cr-Mo alloy contains between about 0.15 and about 0.20 weight percent nitrogen (N), and between about 0.01 and about 0.10 weight percent carbon.
Claim 9
Dependent Claim
19 words
The medical device of claims 1-8 wherein the structure substantially consists of the at least one Co-Cr-Mo alloy filament.
Claim 10
Dependent Claim
20 words
The medical device of claims 1-9 wherein each elongate Co-Cr-Mo element is formed of an at least 50% diameter-reduced filament.
Claim 11
Dependent Claim
24 words
The medical device of claims 1-10 wherein each Co-Cr-Mo element is characterized by an as drawn hardness of at least 45.5 Rockwell C Scale.
Claim 12
Dependent Claim
16 words
The medical device of claims 1-11 wherein each Co-Cr-Mo filament is free from post-drawing heat treatment.
Claim 13
Dependent Claim
45 words
The medical device of claims 1-6 and 9-12 wherein the Co-Cr-Mo alloy contains at least about 50 weight percent cobalt, between about 25-31 weight percent chromium, between about 4-8 weight percent molybdenum, between about 0.15-0.20 weight percent nitrogen and between about 0.01-0.10 weight percent carbon.
Claim 14
Dependent Claim
29 words
The medical device of claims 1-13 wherein the device further includes a membrane of porous material coextensive with at least a portion of the length of the expandable structure.
Claim 15
Dependent Claim
14 words
The medical device of claim 14 wherein the membrane is formed of polymeric material.
References Cited (Backward Citations)
No citation records indexed.
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