Patents by Inventor Joel Vergnault

Joel Vergnault 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 biological denitrification of effluents
    Patent number: 4318988
    Abstract: The present invention is directed to a process for biological denitrification of effluents, containing up to 10 g/l of nitric nitrogen, which comprises using an active denitrification support made of selected high performance denitrifying bacteria fixed on a neutral support.
    Type: Grant
    Filed: December 21, 1979
    Date of Patent: March 9, 1982
    Assignee: PCUK Produits Chimiques Ugine Kuhlmann
    Inventors: Bruno Cabane, Joel Vergnault
  • Process for biological denitrification of effluents
    Patent number: 4209390
    Abstract: The present invention is directed to a process for biological denitrification of effluents, containing up to 10 g/l of nitric nitrogen, which comprises using an active denitrification support made of selected high performance denitrifying bacteria fixed on a neutral support.
    Type: Grant
    Filed: July 6, 1978
    Date of Patent: June 24, 1980
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Bruno Cabane, Joel Vergnault