1
Walther G Grot, Shoibal Banerjee: Membrane and electrode structure. E I Du Pont de Nemours and Company, Cary A Levitt, July 19, 1994: US05330860 (120 worldwide citation)

The electrode layer of a ion exchange membrane is formed by printing a ink of catalytically active particles on the surface of the membrane. The inventive electrode ink comprises:


2
William J Koros, Cheryl W Jones: Composite carbon fluid separation membranes. The University of Texas System, Cary A Levitt, February 22, 1994: US05288304 (53 worldwide citation)

The invention provides carbon membranes for use in fluid separation processes, particularly gas separations, which are treated with a coating that provides a protective barrier which significantly limits permeation of water vapor or other impurities such as hydrocarbons without significantly inhibit ...


3
Walther G Grot: Polymerization of fluorinated copolymers. E I Du Pont de Nemours and Company, Cary A Levitt, January 25, 1994: US05281680 (42 worldwide citation)

The invention is a process for the nonaqueous polymerization of tetrafluoroethylene with functional fluorinated comonomers. The process uses low TFE to comonomer ratios to form copolymers with high molecular weight and low melt flow. The copolymers are useful as membranes in electrolytic cells or fu ...


4
Okan M Ekiner, John W Simmons: Gas separation membranes made from blends of aromatic polyamide, polymide or polyamide-imide polymers. E I Du Pont de Nemours and Company, Cary A Levitt, September 28, 1993: US05248319 (35 worldwide citation)

The present invention provides for gas separation membranes with superior gas transport properties made from a blend of certain polymers. In particular, certain alkyl substituted aromatic polyimides, polyamides or polyamide-imides are blended with certain aromatic polyimides to provide a gas separat ...


5
John W Simmons, Okan M Ekiner: Polyimide and polyamide-imide gas separation membranes. E I Du Pont de Nemours and Company, L Air Liquide, Cary A Levitt, August 3, 1993: US05232472 (22 worldwide citation)

Novel polyimide and polyamide-imide gas separation membranes and the process of using such membranes to separate one or more gases from a gaseous mixture is disclosed. The polyimides and polyamide-imides are formed from a blend of diamines containing the ester derived from 1,3-diamino-2-hydroxypropa ...


6
James T Keating, Everett I Baucom, James M Batman: Membrane reinforced with modified leno weave fabric. E I du Pont de Nemours and Company, Cary A Levitt, January 24, 1995: US05384019 (20 worldwide citation)

An ion exchange membrane reinforced with leno weave yarn system having sacrificial fibers paired with resistant fibers in the warp of the fabric, and an electrolysis process using the membrane are disclosed.


7
John W Simmons: Alkyl substituted polyimide, polyamide and polyamide-imide gas separation membranes. E I Du Pont de Nemours and Company, Cary A Levitt, November 30, 1993: US05266100 (19 worldwide citation)

Novel aromatic polyimide, polyamide and polyamide-imide gas separation membranes and the process of using such membranes to separate one or more gases from a gaseous mixture is disclosed. The polyimides, polyamides and polyamide-imides are formed from diamines of the formula ##STR1## where Ar' is ## ...


8
Samuel E Moore Sr: Apparatus for spinning multicomponent hollow fibers. E I Du Pont de Nemours and Company, Cary A Levitt, June 14, 1994: US05320512 (18 worldwide citation)

The invention provides a spinnerette assembly for multicomponent hollow fibers of the sheath/core type in which the channel for supplying the sheath material is located at a distance from the extrusion orifice of the spinnerette of no more than one-half of the width of the extrusion orifice. The spi ...


9
John W Simmons: Fluorinated aromatic polyimide, polyamide and polyamide-imide gas separation membranes. E I du Pont de Nemours and Company, L Air Liquide, Cary A Levitt, June 14, 1994: US05320650 (18 worldwide citation)

Novel fluorinated aromatic polyimide, polyamide and polyamide-imide gas separation membranes and the process of using such membranes to separate one or more gases from a gaseous mixture is disclosed. The polyimides, polyamides and polyamide-imides are formed from diamines of the formula ##STR1## whe ...


10
Billy J Etienne, Wayne L Mills, Bruno Leprince Ringuet, Frederic Fillet: Hollow fiber membrane separation device with a housing made from a flexible material. E I Du Pont de Nemours and Company, L Air Liquide, Cary A Levitt, January 10, 1995: US05380433 (17 worldwide citation)

The present invention is a hollow fiber separation assembly having one or more bundles of hollow fiber membranes with a tubesheet at each end enclosed by an end cap. An impermeable housing, preferably made from a flexible polymeric material, most preferably a shrinkable tubing, contacts and encloses ...