Multi-property nitinol by heat treatment
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United States of America Patent
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Nov 26, 2002
Grant Date -
N/A
app pub date -
Jul 28, 1999
filing date -
Jul 28, 1999
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Abstract
Medical devices may be made of shape-memory materials portions of which have been heat treated to exhibit spatial variations in the stiffness of the material. Devices including stents, vena cava filters and guidewires may be constructed from such materials. Devices may also be made from shape-memory materials which have been locally heat treated such that the superelasticity of the treated portion is destroyed while the remainder of the shape-memory material can transition between the martensitic and austenitic states.
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