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Biocompatible microcapsules

  • US 5,380,536 A
  • Filed: 08/05/1991
  • Issued: 01/10/1995
  • Est. Priority Date: 10/15/1990
  • Status: Expired due to Term
First Claim
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1. A method for producing transplantable microcapsules wherein the surface is resistant to cellular attachment comprising forming an outer layer of non-ionic water soluble polymers having molecular weights between 2,000 and 100,000 daltons which have been covalently grafted to at least one of the layers, made of polyamine or polyimine polycationic polymers, of the microcapsule membrane, such that said polycationic polymers remain polycationic after grafting.

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