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Graft prosthesis materials

  • US 6,206,931 B1
  • Filed: 08/22/1997
  • Issued: 03/27/2001
  • Est. Priority Date: 08/23/1996
  • Status: Expired due to Term
First Claim
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1. A graft prosthesis, comprising:

  • a purified, collagen-based matrix structure removed from a submucosa tissue source, said purified structure having a contaminant level making said purified structure biocompatible, said purified structure further having an endotoxin level of less than 12 endotoxin units per gram.

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