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Biodegradable polyurethanes

  • US 6,221,997 B1
  • Filed: 04/27/1998
  • Issued: 04/24/2001
  • Est. Priority Date: 04/28/1997
  • Status: Expired due to Fees
First Claim
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1. A biodegradable polyurethane material having a backbone containing at least one amino acid group and formed by reaction of a polyol, a diisocyanate and a chain extender, said chain extender being formed by reaction of an amino acid with a diol, said amino acid group being present in said chain extender and in a condition rendering it recognizable by a biological agent.

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