Patent Number: 6,254,921

Title: Coating process and apparatus

Abstract: A process and apparatus for dip-coating intermediate and/or discrete discontinuous portions of longitudinal devices, including medical devices such as catheters and guidewires. The apparatus provides a chamber in which both the desired portion(s) of the device and the coating solution can be controllably contacted. A controlled coating can be achieved within the chamber by providing and controlling one or more of the following relationships: a) the manner in which a chamber (containing solution) is itself moved with respect to a static device, b) the manner in which the device is moved with respect to a fixed chamber position containing a fixed volume of solution, and/or c) the manner in which both the chamber and device are fixed in position, and the coating is achieved by adding and removing a volume of solution from the chamber. The resultant movement of solution and device is intended to mimic or replicate the relative movements involved in a conventional dip-coating procedure, at least along the length of device to be coated.

Inventors: Chappa; Ralph A. (Prior Lake, MN), Porter; Steven J. (Minnetonka, MN)

Assignee: SurModics, Inc.

International Classification: B05C 3/09 (20060101); B05D 7/20 (20060101); B05D 1/18 (20060101); B05D 1/32 (20060101); A61L 027/00 (); B05D 001/18 (); B05D 001/32 (); B05C 003/12 ()

Expiration Date: 07/03/2018