The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 2013
Filed:
Apr. 17, 2009
Ralph A. Chappa, Ham Lake, MN (US);
Robert W. Hergenrother, Eden Prairie, MN (US);
Shannon A. Wadman, Minneapolis, MN (US);
Klaus R. Wormuth, St. Louis Park, MN (US);
Ralph A. Chappa, Ham Lake, MN (US);
Robert W. Hergenrother, Eden Prairie, MN (US);
Shannon A. Wadman, Minneapolis, MN (US);
Klaus R. Wormuth, St. Louis Park, MN (US);
Surmodics, Inc., Eden Prairie, MN (US);
Abstract
Described are coating systems for the controlled delivery of hydrophilic bioactive agents, for example, from implantable medical devices. The coating systems of the invention comprise (a) a polymeric basecoat layer containing one or more hydrophilic bioactive agents; and (b) an elution-controlling topcoat layer that comprises a poly(ethylene-co-vinyl acetate) copolymer. The elution rate of the hydrophilic bioactive agent can be controlled by varying the vinyl acetate concentration in the elution-controlling topcoat layer.