Patents by Inventor Pierre Elmerich

Pierre Elmerich has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for removing phosphate from waste water
    Patent number: 5759401
    Abstract: An improved process for removing phosphate from waste water comprising simultaneously injecting a coagulating agent upstream and downstream of a stage of biological oxidation in aerobic medium.
    Type: Grant
    Filed: January 22, 1996
    Date of Patent: June 2, 1998
    Assignee: Elf Atochem S.A.
    Inventors: Jean-Fran.cedilla.ois Boussely, Marin Dernat, Pierre Elmerich