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pH-sensitive block copolymers for pharmaceutical compositions

  • US 7,094,810 B2
  • Filed: 06/25/2003
  • Issued: 08/22/2006
  • Est. Priority Date: 06/08/2001
  • Status: Expired due to Term
First Claim
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1. A pharmaceutical composition comprising:

  • a diblock copolymer of poly(ethylene oxide) and poly(butyl (alkyl)acrylate-co-(alkyl)acrylic acid); and

    at least one biologically active agent.

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