Patent ID: 7655584

Claim:
An implantable thrombogenic article comprising melt-formed abraded filaments and continuous melt-formed filaments to form a porous web material, wherein said material is formed by self-cohering filaments to each other at multiple contact points and then subjecting the material to a carding procedure where at least some of the filaments are engaged and separated from each other, wherein said filaments comprise at least one semi-crystalline polymeric component covalently bonded to or blended with at least one amorphous polymeric component, wherein the filaments possess partial to full polymeric component phase immiscibility when in a crystalline state, wherein said implantable article has a percent porosity greater than ninety absent inclusion of any fillers or other added components that may effectively reduce said porosity, and a relative blood clot time value of approximately 0.7 when compared to the positive citrated calcium control value of 1.0.