Patents by Inventor Cheol Whan Lee

Cheol Whan Lee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8845716
    Abstract: The present invention provides a multilayer-coated stent for controlled drug release, comprising: a first base layer formed on a stent support and made of poly(ethylene-co-vinylacetate) or polystyrene-ethylene-butylene rubber polymer; a second coating layer formed on the first base layer and made of a biocompatible or a bioabsorbable polymer and a drug component; and a third coating layer formed on the second coating layer and made of a biocompatible or a bioabsorbable polymer and a drug component different from the drug component of the second coating layer. The inventive stent can deliver a broad range of therapeutic substances for a long time and prevent the early rapid release of the drug components in blood. Also, unlike the existing drug-coated stents, the inventive stent includes two kinds of drugs complementary to each other, but can optimize the efficacy of the drugs by differentiating the control of drug release according to time.
    Type: Grant
    Filed: August 25, 2005
    Date of Patent: September 30, 2014
    Inventors: Kyung Bum Lee, Seung Jung Park, Cheol Whan Lee