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:
Apr. 27, 2021
Filed:
Jun. 16, 2016
W. L. Gore & Associates, Inc., Newark, DE (US);
W. L. Gore & Associates Gmbh, Putzbrunn, DE;
Donald L. Hollenbaugh, Jr., North East, MD (US);
Bernadette Heller, Taufkirchen, DE;
Gopalan V. Balaji, Kennett Square, PA (US);
Rebecca Buxbaum, Newark, DE (US);
W. L. Gore & Associates, Inc., Newark, DE (US);
W. L. Gore & Associates GmbH, Putzbrunn, DE;
Abstract
Polytetrafluoroethylene (PTFE) composite articles that have a macro textured surface. The composite articles include at least two different PTFE membranes in a layered or stacked configuration. The composite article has a macro textured surface characterized by a plurality of strands raised from the surface of the PTFE membrane. The strands may be formed of either interconnected nodes of PTFE or of at least one nodal mass of PTFE and have a length equal to or greater than about 1.5 mm. The macro textured surface provides a topography to the first PTFE membrane. The composite articles have a bubble point from about 3.0 psi to about 200 psi, a thickness from about 0.01 to about 3.0 mm, and a bulk density from about 0.01 g/cmto about 1.0 g/cm.