Patents Assigned to Omer Evrard
  • Alkali or alkaline earth metal ferrates, their preparation and their industrial applications
    Patent number: 5284642
    Abstract: The ferrates in solid state have the formula:M (Fe, X)O.sub.4in which M designates two atoms of Na or K or one atom of Ca or Ba, and X is an atom whose cation has the electronic structure of a rare gas. These ferrates are isomorphs of ferrates of the formula M FeO.sub.4, in which M has the same definition as above. Used particularly for the treatment of water, by oxidation.
    Type: Grant
    Filed: May 6, 1992
    Date of Patent: February 8, 1994
    Assignees: Centre International de l'Eau de Nancy (NAN.C.I.E.), Omer Evrard
    Inventors: Omer J. Evrard, Rene A. Gerardin, Nathalie Schmitt, Jean-Luc Evrard