US 5,620,763 AGranted

Thin-wall, seamless, porous polytetrafluoroethylene tube

AssigneeW. L. Gore & Associates, Inc.

InventorsWayne D. House, Kenneth W. Moll, Stanislaw L. Zukowski

Life of this patent

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Abstract

A seamless tube of polytetrafluoroethylene having a microstructure of nodes interconnected by fibrils and having a wall thickness of less than about 0.20 mm.

Claims28

Dependent claims

An article comprising a seamless tube of porous polytetrafluoroethylene having a wall thickness of less than about 0.08 mm and a bulk density less than about 2.0 g/cc.

Dependencies are inferred from the claim text.

Facts

Application: 08/412,840Filed 29 Mar 1995 · continuation
Priority: 18 Aug 1993
Granted: 15 Apr 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification22 codes

B29D 23/20
Producing tubular articles: flexible squeeze tubes, e.g. for cosmetics
A61L 27/16
Macromolecular materials: obtained by reactions only involving carbon-to-carbon unsaturated bonds
A61L 31/048
Macromolecular materials: obtained by reactions only involving carbon-to-carbon unsaturated bonds
B29C 51/082
Deep drawing or matched-mould forming, i.e. using mechanical means only: by shaping between complementary mould parts

Family

Serial108,960Parent of this continuation · filed 18 Aug 1993
US 5,620,763 AThis patent

From the US filing history. Foreign family members aren’t listed.

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