×

Multi-layer coated porous materials and methods of making the same

  • US 7,507,469 B2
  • Filed: 08/18/2006
  • Issued: 03/24/2009
  • Est. Priority Date: 08/28/2001
  • Status: Expired due to Term
First Claim
Patent Images

1. A multi-layer coated material comprising a surface activated substrate, a first layer, and a second layer, wherein the surface activated substrate comprises a sintered porous polymeric material;

  • the first layer comprises polyethylenimine molecules bound directly to a surface of the surface activated substrate through covalent bonds and electrostatic interactions, the polyethylenimine molecules comprising neutral amine functional groups and charged amine functional groups; and

    the second layer comprises polyelectrolyte molecules bound to the first layer through covalent bonds, electrostatic interactions, or combinations thereof.

View all claims
  • 8 Assignments
Timeline View
Assignment View
    ×
    ×