W. L. Gore & Associates, Inc.

Michael L McDonald

Thane L Kranzler

William J Hendershot

Vivian J Timian

A method of welding together overlapped edges of porous PTFE sheet materials by applying ultrasonic energy wherein the overlapped edges remain porous after welding. Composite articles made by the welding process are also described.

Method of ultrasonically welding articles of porous

A sheet of implantable patch tissue repair material having the form of a layer of porous polytetrafluoroethylene sheet material laminated to a layer of mesh-type sheet material having a multiplicity of openings through the mesh-type sheet material, said openings having a mean minimum diameter of about 0.1 mm. The inventive patch tissue repair material offers good strength characteristics, good biocompatibility, suture retention, and flexibility.

Laminated patch tissue repair sheet material

A sheet of implantable patch tissue repair material comprising a layer of porous polytetrafluoroethylene sheet material laminated to a layer of mesh-type sheet material having a multiplicity of openings through the mesh-type sheet material, said openings having a mean minimum diameter of at least about 0.1 mm. The inventive patch tissue repair material offers good strength characteristics, good biocompatibility, suture retention, and flexibility.

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Flagstaff, AZ, United States of America

Michael L McDonald