Julio R Duran

US Patent:

7666496, Feb 23, 2010

Filed:

May 24, 2006

Appl. No.:

11/439844

Inventors:

Julio Duran - Morris Plains NJ, US

Assignee:

Boston Scientific Scimed, Inc. - Maple Grove MN

International Classification:

D21H 13/12
B32B 3/26

US Classification:

42831151, 4283155, 428543, 623 139, 623 149, 623 154

Abstract:

The ePTFE structure includes an ePTFE structure which has a node and fibril micro-structure. The micro-structure includes specific nodes which are connected to the fibrils. One or more of the specific nodes are sintered and the fibrils are un-sintered. A method for making the ePTFE structure includes identifying and sintering one or more of the specific nodes.

US Patent:

20090048657, Feb 19, 2009

Filed:

Aug 15, 2007

Appl. No.:

11/893141

Inventors:

Julio Duran - Morris Plains NJ, US
Jamie S. Henderson - Oakland NJ, US
Krzysztof Sowinski - Lodz, PL

International Classification:

A61F 2/06

US Classification:

623 113

Abstract:

The ePTFE structure has a node and fibril micro-structure. The ePTFE structure includes first and second regions each of which has a corresponding density. The density of the first region is different from the density of the second region.

US Patent:

7524445, Apr 28, 2009

Filed:

Dec 31, 2004

Appl. No.:

11/026657

Inventors:

Julio Duran - Morris Plains NJ, US
Krzysztof Sowinski - Wallington NJ, US

Assignee:

Boston Scientific Scimed, Inc. - Maple Grove MN

International Classification:

B29C 55/26

US Classification:

264112, 264127, 2642888, 2642902

Abstract:

A method for making a vascular graft includes providing a PTFE green tube extrudate which is un-sintered, and then initially expanding the un-sintered extrudate to produce an initial node and fibril micro-structure therein. This is followed by heating the extrudate to raise the temperature thereof for a time period of sufficient duration such that the extrudate is partially sintered. The partially sintered extrudate is subsequently expanded to make the vascular graft. The subsequent expansion produces a subsequent node and fibril micro-structure in the vascular graft. An alternative method for making a vascular graft includes providing a PTFE green tube extrudate which is un-sintered, longitudinally expanding the un-sintered extrudate to form an ePTFE tube structure, and radially expanding the un-sintered ePTFE tube structure. ePTFE made according to the method is fabricated into various structures, such as tube structures, filament structures, and sheet structures.