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Method and composition for the preparation of controlled long-acting pharmaceuticals for oral administration

  • US 4,680,323 A
  • Filed: 12/01/1983
  • Issued: 07/14/1987
  • Est. Priority Date: 12/01/1983
  • Status: Expired due to Term
First Claim
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1. A sustained release pharmaceutical carrier suitable for admixture with active ingredients comprising:

  • (a) 5.5-98.5% by weight of hydroxypropyl methylcellulose;

    (b) 0.25-4.5% by weight of hydroxypropyl cellulose;

    (c) 1-90% by weight of a carboxyvinyl polymer.

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