Patents by Inventor René Derie

René Derie 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).

  • Sludge treatment method
    Patent number: 7344489
    Abstract: Process for the treatment of a sludge containing heavy metals and organic matter according to which foaming of the sludge is brought about and it is dried.
    Type: Grant
    Filed: October 16, 2003
    Date of Patent: March 18, 2008
    Inventors: Rene Derie, Guy Depelsenaire, Ange Nzihou
  • Sludge treatment method
    Publication number: 20050258105
    Abstract: Process for the treatment of a sludge containing heavy metals and organic matter according to which foaming of the sludge is brought about and it is dried.
    Type: Application
    Filed: October 16, 2003
    Publication date: November 24, 2005
    Applicant: SOLVAY (SOCIETE ANONYME)
    Inventors: Rene Derie, Guy Depelsenaire, Ange Nzihou
  • Sludge inerting method
    Patent number: 6962562
    Abstract: Process for rendering inert a sludge (1) comprising heavy metals and organic matter, according to which phosphoric acid (2) is added to the sludge and the latter is subjected to calcination (6). A hydraulic binder (9) is mixed with the product of the calcination (7) and mixed with water (8). The resulting mixture (11) is subjected to setting and curing.
    Type: Grant
    Filed: October 16, 2001
    Date of Patent: November 8, 2005
    Assignee: Solvay (Societe Anonyme)
    Inventors: Guy Depelsenaire, René Derie
  • Sludge inerting method
    Publication number: 20040112842
    Abstract: Process for rendering inert a sludge (1) comprising heavy metals and organic matter, according to which phosphoric acid (2) is added to the sludge and the latter is subjected to calcination (6). A hydraulic binder (9) is mixed with the product of the calcination (7) and mixed with water (8). The resulting mixture (11) is subjected to setting and curing.
    Type: Application
    Filed: September 2, 2003
    Publication date: June 17, 2004
    Inventors: Guy Depelsenaire, Rene Derie
  • Ash inerting method
    Patent number: 6132355
    Abstract: Process for rendering ash inert, according to which a reactant selected from phosphoric acid and alkali metal phosphates is added to the ash, the phosphate-containing mixture thus obtained is subjected to puddling with water and a hydraulic binder so as to form a hydraulic mortar, and the mortar is subjected to setting and hardening.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: October 17, 2000
    Assignee: Solvay (Societe Anonyme)
    Inventor: Rene Derie