1
Jeffery B Bowman, Daniel E Hubis, James D Lewis, Stephen C Newman, Richard A Staley: Process for producing a high strength porous polytetrafluoroethylene product having a coarse microstructure. W L Gore & Associates, Finnegan Henderson Farabow Garrett & Dunner, November 13, 1984: US04482516 (212 worldwide citation)

Porous polytetrafluoroethylene materials having high strength and coarse microstructure are produced by densifying the materials after removal of lubricant and then stretching. The term, "coarse," is used to indicate that the nodes are larger, the fibrils are longer, and the effective pore size is l ...


2
Phillip A Branca, Daniel E Hubis, Wolfgang Buerger, Christiane Rudolf, Ralf Tillmanns: Strong, air permeable membranes of polytetrafluoroethylene. W L Gore & Associates, W L Gore & Associates, Gary A Samuels, September 29, 1998: US05814405 (122 worldwide citation)

Microporous membranes are described and characterized as having a morphological microstructure of very highly elongated nodes interconnected by fibrils which form a structural network of voids or pores through the spaces between the nodes and fibrils, which voids or pores extend from one side of the ...


3
Daniel E Hubis: Multi-component, highly porous, high strength PTFE article and method for manufacturing same. W L Gore & Associates, John S Campbell, May 24, 1983: US04385093 (92 worldwide citation)

A method for producing a multi-component, porous PTFE article. Components of PTFE containing a liquid lubricant are placed in intimate contact, dried and then stretched in one or more directions. The PTFE components may optionally contain a filler. The resultant product has a virtually uninterrupted ...


4
Daniel E Hubis: Method for manufacturing highly porous, high strength PTFE articles. W L Gore & Associates, John S Campbell, October 23, 1984: US04478665 (72 worldwide citation)

A method for producing a multi-component, porous PTFE article. Components of PTFE containing a liquid lubricant are placed in intimate contact, dried and then stretched in one or more directions. The PTFE components may optionally contain a filler. The resultant product has a virtually uninterrupted ...


5
Phillip A Branca, Daniel E Hubis, Robert S Mallouk, Randal L Perry: Electrolytic cell with composite, porous diaphragm. E Alan Uebler, February 2, 1993: US05183545 (63 worldwide citation)

A composite, porous, liquid-permeable article is provided which is a multilayer structure of discrete, bonded layers of porous, expanded polytetrafluoroethylene (EPTFE). The composite has its interior and exterior surfaces coated with a perfluoro ion exchange polymer to render the composite hydrophi ...


6
Gordon L McGregor, Raymond B Minor, William P Mortimer Jr, Daniel E Hubis: Composition of expanded polytetrafluoroethylene and similar polymers and method for producing same. W L Gore & Associates, David J Johns, July 4, 1995: US05429869 (46 worldwide citation)

The present invention provides improved compositions of expanded polytetrafluoroethylene (PTFE) and similar polymers and methods for forming and using such compositions. In its preferred embodiment, the present invention employs a mixture of PTFE and expandable thermoplastic microspheres. Through ap ...


7
Phillip A Branca, Daniel E Hubis, Robert S Mallouk, Randal L Perry: Composite, porous diaphragm. Morlenson & Uebler, March 10, 1992: US05094895 (45 worldwide citation)

A composite, porous, liquid-permeable article is provided which is a multilayer structure of discrete, bonded layers of porous, expanded polytetrafluoroethylene (EPTFE), which composite has its interior and exterior surfaces coated with a perfluoro ion exchange polymer to render the composite hydrop ...


8
Edwin G Dauber, Daniel E Hubis, Gordon L McGregor, Raymond B Minor, William P Mortimer Jr: Reusable resilient gasket and method of using same. W L Gore & Associates, Carol A Lewis White, June 29, 1999: US05916671 (21 worldwide citation)

An improved gasket particularly suitable for use in sensitive environments is disclosed. The preferred gasket of the present invention comprises at least one layer of a composite material of porous polytetrafluoroethylene (PTFE) polymer and resilient expandable microspheres. The composite material p ...