1
Heinz Joachim Muller, Friedbert Wechs: Process for producing microporous powders and membranes. Akzo, Oliff & Berridge, November 6, 1990: US04968733 (137 worldwide citation)

A process produces microporous powders or shaped articles, in particular membranes in the form of flat films, tubular films or hollow fibers, which may be used for controlled release of an active compound, for dialysis, gas separation, ultrafiltration or microfiltration, from polyvinylidene fluoride ...


2
Heinz Joachim Muller, Heinz Dieter Sluma, Gunter Eberhard, Ernst Spindler, Lothar Krauss, Helmut Volker: Flat or capillary membrane based on a homogeneous mixture of polyvinylidene fluoride and a second polymer which can be rendered hydrophilic by chemical reaction. AKZO, Oliff & Berridge, November 19, 1991: US05066401 (92 worldwide citation)

Membranes are based on a homogeneous mixture of polyvinylidene fluoride and a second polymer which can be rendered hydrophilic by chemical reaction. The membranes contain 70 to 98 percent by weight of polyvinylidene fluoride and 2 to 30 percent by weight of a polymer formed essentially from polymeth ...


3
Heinz Joachim Muller: Modified membranes. Siemens Water Technologies, November 27, 2007: US07300022 (77 worldwide citation)

A porous polymeric membrane formed from a blend of a polymeric membrane forming material, such as polyvinylidene fluoride or polysulfone and a polymeric reactivity modifying agent adapted to modify the surface active properties of the porous polymeric membrane. The reactivity modifying agent is pref ...


4
Daniel Mullette, Heinz Joachim Muller: Poly(ethylene chlorotrifluoroethylene) membranes. Siemens Water Technologies, July 24, 2007: US07247238 (65 worldwide citation)

Porous polymeric membranes including Halar (poly (ethylene chlorotrifluoroethylene)) and related compounds and the methods of production thereof which avoid the use of toxic solvents. Preferred solvents, coating agents and pore forming agents are citric acid ethyl ester or glycerol triacetate. The m ...


5
Heinz Joachim Muller, Daniel Mullette: Membrane polymer compositions. Siemens Water Technology, June 5, 2007: US07226541 (59 worldwide citation)

The invention relates to a terpolymer of tetrafluoroethylene (TFE) monomer, polyvinylidene fluoride (PVDF) monomer and hexafluoropropylene (HFP) monomer for forming an ultrafiltration or microfiltration membrane, method of forming said membranes, and to the ultrafiltration or microfiltration membran ...


6
Heinz Joachim Muller: Modified membranes. U S Filter Wastewater Group, Knobbe Martens Olson & Bear, April 26, 2005: US06884350 (59 worldwide citation)

A porous polymeric membrane formed from a blend of a polymeric membrane forming material, such as polyvinylidene fluoride or polysulfone and a polymeric reactivity modifying agent adapted to modify the surface active properties of the porous polymeric membrane. The reactivity modifying agent is pref ...


7
Daniel Mullette, Heinz Joachim Muller: Poly(ethylene chlorotrifluoroethylene) membranes. Siemens Water Technologies, December 15, 2009: US07632439 (47 worldwide citation)

Porous polymeric membranes including HALAR® (poly(ethylene chlorotrifluoroethylene)) and related compounds and the methods of production thereof which avoid the use of toxic solvents. Preferred solvents, coating agents and pore forming agents are citric acid ethyl ester or glycerol triacetate. The m ...


8
Heinz Joachim Muller: Modified membranes. Siemens Water Technologies, July 29, 2008: US07404896 (42 worldwide citation)

A porous polymeric membrane formed from a blend of a polymeric membrane forming material, such as polyvinylidene fluoride or polysulfone and a polymeric reactivity modifying agent adapted to modify the surface active properties of the porous polymeric membrane. The reactivity modifying agent is pref ...


9
Heinz Joachim Muller: Gas transfer membrane. Siemens Water Technologies, October 26, 2010: US07819956 (41 worldwide citation)

Porous polymeric membranes formed from a hydrophobic polymer, such as halar having membrane pores of a size sufficient to permit gas and/or vapor permeation 0.05 μm to 5 μm without permitting the flow of a hydrophilic fluid across the membrane. Pore distribution is uniform and porosity is high, in s ...


10
Udo Holzki, Heinz Joachim Muller, Tilo Renner: Multi-layer microfiltration membrane having an integrated prefiltration layer and method of making same. Seitz Filter Werke und Co, Robert W Becker & Associates, April 15, 1997: US05620790 (40 worldwide citation)

A multi-layer microfiltration membrane having an integrated prefiltration layer. Pursuant to a phase inversion process, several layers are successively poured out onto one another prior to phase separation of a lower layer, with the viscosity for the pour solution decreasing toward the upper layers. ...