1
Robert E Kesting, Alfred K Fritzsche, Milton K Murphy, Alan C Handerman, Clint A Cruse, Raymond F Malon: Asymmetric gas separation membranes having graded density skins. Permea, November 14, 1989: US04880441 (41 worldwide citation)

Asymmetric gas separation membranes having graded density skins and macrovoid-free morphology comprised of glassy, hydrophobic polymers are disclosed which are effective for separation gases with significante increases in permeation while maintaining equal or greater separation electivity. The membr ...


2
Robert E Kesting: Polyoxyethylene grafted membrane materials with grafting links derived from a diisocyanate. Puropore, Knobbe Martens Olson Hubbard & Bear, July 28, 1981: US04280970 (39 worldwide citation)

Membrane forming polymers are converted to hydrophilic polymeric membranes by (a) grafting a polyoxyethylene chain to a membrane forming polymer structure and thereafter forming a membrane; (b) coating a membrane with a polymer to which a polyoxyethylene chain has been grafted; or (c) grafting in si ...


3
Robert E Kesting: Microporous polyester membranes and polymer assisted phase inversion process for their manufacture. Chemical Systems Incorporated, Knobbe Martens Olson Hubbard & Bear, May 18, 1976: US03957651 (34 worldwide citation)

Microporous membrane filters composed of polyesters derived from aromatic dibasic acids and especially polytetramethylene terephthalate are produced. These membranes are produced by a polymer assisted phase inversion process involving casting a solution of the polyester and assisting polymer to form ...


4
Robert E Kesting: Integral microporous high void volume polycarbonate membranes and a dry process for forming same. Chemical Systems, Knobbe Martens Olson Hubbard & Bear, March 23, 1976: US03945926 (33 worldwide citation)

Integral, skinned and unskinned, microporous microfiltration and ultrafiltration, electrophoresis membranes having high void volumes (above 50% void) composed of polycarbonates and copolymers of polycarbonates with polyalkylene oxides and the dry process for producing such membranes are disclosed.


5
Robert E Kesting: Process for spinning dry-fiber cellulose acetate hollow fiber membranes. Chemical Systems, Knobbe Martens Olson Hubbard & Bear, July 12, 1977: US04035459 (26 worldwide citation)

A dry-wet process for forming interiorally asymmetric hollow fiber cellulose acetate membranes is disclosed.


6
Peter J Degen, John Mischenko III, Robert E Kesting, Moira H Bilich, Trevor A Staff: Integrity-testable wet-dry-reversible ultrafiltration membranes and method for testing same. Pall Corporation, Leydig Voit & Mayer, January 2, 1996: US05480554 (17 worldwide citation)

The present invention provides for the first time ultrafiltration/diafiltration membranes that are capable of excluding 0.02 .mu.m diameter, monodisperse, latex particles and are capable of being dried without loss of such ultrafiltration properties. A rapid, reliable method for integrity testing me ...


7
Robert E Kesting, Alfred K Fritzsche, Milton K Murphy, Alan C Handermann, Clint A Cruse, Raymond F Malon: Process for forming asymmetric gas separation membranes having graded density skins. Permea, October 3, 1989: US04871494 (17 worldwide citation)

A process for forming high free volume, asymmetric gas separation membranes having graded density skins and macrovoid-free morphology from a solvent system comprising a Lewis acid, Lewis base, and a Lewis acid:base complex which dissolve hydrophobic polymers. The dopes have high total solids, high v ...


8
Robert E Kesting: Dry process for forming polycarbonate membranes. Chemical Systems, Knobbe Martens Olson Hubbard & Bear, September 13, 1977: US04048271 (17 worldwide citation)

Integral, skinned and unskinned, microporous microfiltration and ultrafiltration, electrophoresis membranes having high void volumes (above 50% void) composed of polycarbonates and copolymers of polycarbonates with polyalkylene oxides and the dry process for producing such membranes are disclosed.


9
Robert E Kesting: Highly anisotropic membranes. Puropore, Knobbe Martens, June 8, 1982: US04333972 (15 worldwide citation)

The discovery that highly anisotropic membranes, e.g. with a degree of anisotropy of five can for the very first time be produced by the dry phase inversion process by a very specific combination of polymers, solvent and non-solvent, optionally along with plasticizers and modifiers, all of which sep ...


10
Robert E Kesting: High strength nylon blend membranes. Puropore, Hubbard & Stetina, May 22, 1984: US04450126 (12 worldwide citation)

A casting solution of two nylons in formic acid, e.g., high molecular weight extrusion grade Nylon 66 homopolymer [.eta.] about 2 or higher, and nylon multipolymer 66, 610, 6 as a strengthening polymer and gelation promoter, when cast by either the dry or wet phase inversion processes, results in hi ...