| http://www.w3.org/ns/prov#value | - TECHNOLOGICAL BACKGROUND [0005] U.S. Pat. No. 5480711 discloses nano-porous PTFE and its use as a biomaterial. [0006] UA-A-5716660 discloses e-PTFE prostheses impregnated with a solid insoluble biocompatible material, specifically an extracellular matrix protein, such as collagen or gelatin. [0007] U.S. Pat. No. 5972027 proposes to load a porous stent with a biomaterial, such as a drug.
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