Medical devices including hardened alloys
First Claim
1. An endoprosthesis, comprising a tubular member capable of maintaining patency of a bodily vessel, the tubular member comprising a mixture comprising a matrix having a first composition and a plurality of particles embedded within the matrix, the plurality of particles having a second composition, the first composition comprising less than about 25 weight percent chromium, less than about 7 weight percent molybdenum, from about 10 to about 35 weight percent nickel, iron, and platinum, the second composition being different from the first composition and being present from about 0.1 weight percent to about 5 weight percent of the mixture, wherein the second composition is selected from the group consisting of Pt—
- Ir, Pt—
Au, Cr—
Pt, Pt—
Cu, Pt—
Ti, and Pt—
Al, wherein the mixture has a hardness greater than a hardness of the first composition.
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Accused Products
Abstract
Medical devices, such as endoprostheses, and methods of making the devices are disclosed. The endoprostheses comprise a tubular member capable of maintaining patency of a bodily vessel. The tubular member includes a mixture of at least two compositions, where the presence of the second composition gives the mixture a greater hardness than that of the first composition alone. The first composition includes less than about 25 weight percent chromium, less than about 7 weight percent molybdenum, from about 10 to about 35 weight percent nickel, and iron. The second composition is different from the first and is present from about 0.1 weight percent to about 5 weight percent of the mixture.
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Citations
20 Claims
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1. An endoprosthesis, comprising a tubular member capable of maintaining patency of a bodily vessel, the tubular member comprising a mixture comprising a matrix having a first composition and a plurality of particles embedded within the matrix, the plurality of particles having a second composition, the first composition comprising less than about 25 weight percent chromium, less than about 7 weight percent molybdenum, from about 10 to about 35 weight percent nickel, iron, and platinum, the second composition being different from the first composition and being present from about 0.1 weight percent to about 5 weight percent of the mixture, wherein the second composition is selected from the group consisting of Pt—
- Ir, Pt—
Au, Cr—
Pt, Pt—
Cu, Pt—
Ti, and Pt—
Al, wherein the mixture has a hardness greater than a hardness of the first composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- Ir, Pt—
- 15. A medical device comprising a precipitation hardenable alloy having a composition comprising in weight percent:
Specification