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Protected magnesium alloys for bioresorbable stents
US11517649B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11517649-B2 |
| Application number | US-201916442740-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 17, 2019 |
| Priority date | Nov 6, 2014 |
| Publication date | Dec 6, 2022 |
| Grant date | Dec 6, 2022 |
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- Title
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- Abstract
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Abstract
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Biodegradable magnesium alloy implantable medical devices are protected to delay onset of corrosion, and thus biodegradability, or to corrode more uniformly. The protection allows for extended effective use of the devices while maintaining biodegradability. Examples of protective coatings include conversion coatings that at least partially remove exposed second phases from a surface of the magnesium alloy and coatings that provide a barrier between water and the surface of the magnesium alloy.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for forming a biodegradable implantable medical stent frame, the method comprising: drawing a first magnesium tube over a magnesium alloy tube or wire to form a magnesium cladded magnesium alloy structure; and forming the biodegradable implantable medical stent frame from the magnesium cladded magnesium alloy structure. 2. The method of claim 1 , wherein the first magnesium tube is drawn over a magnesium alloy wire. 3. The method of claim 1 , wherein the first magnesium tube is drawn over a magnesium alloy tube. 4. The method of claim 3 , further comprising drawing the magnesium alloy tube over a second magnesium tube, wherein the magnesium cladded magnesium alloy structure comprises an inner magnesium layer, and outer magnesium layer, and a layer of magnesium alloy between the inner magnesium layer and the outer magnesium layer. 5. The method of claim 1 , wherein forming the biodegradable implantable medical stent frame comprises laser cutting the magnesium cladded magnesium alloy structure. 6. The method of claim 1 , wherein forming the biodegradable implantable medical stent frame comprises welding the magnesium cladded magnesium alloy structure. 7. A method for manufacturing a biodegradable frame for an implantable medical stent, comprising: providing a tube having an inner layer of magnesium, an outer layer of magnesium, and a magnesium alloy layer between the inner and outer layers of magnesium; and laser cutting the tube to produce the frame.
Assignees
Inventors
Classifications
- A61L31/022Primary
Metals or alloys · CPC title
connected peak to trough · CPC title
with bands having a meander structure, adjacent bands being connected to each other · CPC title
the wire-like elements comprising two or more adjacent rings flexibly connected by separate members · CPC title
Coatings comprising two or more layers · CPC title
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- What does patent US11517649B2 cover?
- Biodegradable magnesium alloy implantable medical devices are protected to delay onset of corrosion, and thus biodegradability, or to corrode more uniformly. The protection allows for extended effective use of the devices while maintaining biodegradability. Examples of protective coatings include conversion coatings that at least partially remove exposed second phases from a surface of the magn…
- Who is the assignee on this patent?
- Medtronic Vascular Inc
- What technology area does this patent fall under?
- Primary CPC classification A61L31/022. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Dec 06 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).