Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Reexamination Certificate
2005-10-04
2005-10-04
Nolan-Rayford, Sandra M. (Department: 1772)
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
C604S096010, C604S103090, C604S915000
Reexamination Certificate
active
06951674
ABSTRACT:
A combination of urethane polymeric components provides desired characteristics in forming medical instruments such as catheters and balloons for dilatation catheters. For example, a balloon material is formed form a blend of urethane polymeric components, including a first polymeric component having a first glass transition temperature and a second polymeric component having a second glass transition temperature. The first polymeric component can be branched or straight chain of thermoplastic polyurethane compound having a glass transition temperature polyurethane compound having a glass transition temperature higher than normal human body temperature. The second polymeric component can be a second thermoplastic polyurethane having a glass transition temperature equal to or lower than normal human body temperature. The polymeric blend can be heat treated to further enhance the properties or stability of the balloon material, including significantly increasing burst pressure.
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Nolan-Rayford Sandra M.
Sci-Med Life Systems, Inc.
Vidas Arrett & Steinkraus
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