Patents Examined by Ann M. Fortuna
  • Composite nanofiltration membrane
    Patent number: 5266207
    Abstract: Mechanically strong and thermally/chemically-resistant composite nanofiltration membranes, well adapted for the separation of low molecular weight compounds, comprise a porous inorganic support substrate, the pore diameters of which ranging from 3 to 10 nm, this inorganic support substrate having a polymer membrane which comprises an elastomeric polyphosphazene densely deposited on at least one of the face surfaces thereof, the structural porosity of such polyphosphazene membrane ranging from 0.2 to 2 nm.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: November 30, 1993
    Assignee: Techsep
    Inventors: Anne Boye, Andre Grangeon, Christian Guizard