PTFE layers and methods of manufacturing
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United States of America Patent
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Jan 24, 2017
Grant Date -
Dec 4, 2014
app pub date -
Aug 13, 2014
filing date -
Apr 13, 2005
priority date (Note) -
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Abstract
Single, continuous PTFE layers having lateral zones of varied characteristics are described. Some of the lateral zone embodiments may include PTFE material having little or no nodal and fibril microstructure. Methods of manufacturing PTFE layers allow for controllable permeability and porosity of the layers, in addition to other characteristics. The characteristics may vary from one lateral zone of a PTFE layer to a second lateral zone of a PTFE layer. In some embodiments, the PTFE layers may act as a barrier layer in an endovascular graft or other medical device.
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