Patents by Inventor Gerard L. Dagois

Gerard L. Dagois 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).

  • Biological contactor for purifying water to produce drinking water
    Patent number: 5087354
    Abstract: A biological contactor with a granular bed including a layer based on activated carbon, the material of which satisfies the following conditions:density between 0.18 and 0.32 g/cm.sup.3,carbon tetrachloride adsorbing power between 60% and 120% by weight,carbon tetrachloride retention less than 25% by weight of the carbon tetrachloride adsorbed mass,the carbon tetrachloride adsorbed mass, methylene blue: between 5 and 30 ml,particle size: between 0.5 and 1.5 mm effective size with a coefficient of uniformity less than 2.A washing cycle (air only; air plus water; water only) of the contactor is triggered when a parameter representative of the population of algae in said layer reaches a predetermined set point threshold.
    Type: Grant
    Filed: November 20, 1990
    Date of Patent: February 11, 1992
    Assignee: Societe Pica-Produits Industriels et Charbons Actifs
    Inventors: Jean R. Montagnon, Guy P. Bablon, Gerard L. Dagois, Claire C. Ventresque
  • Biological contactor for purifying water to produce drinking water and associated control method
    Patent number: 5037550
    Abstract: A biological contactor (8) comprises a granular bed including a layer (17) based on activated carbon the material of which satisfies the following conditions:density between 0.18 and 0.32 g/cm.sup.3,carbon tetrachloride adsorbing power between 60% and 120% by weight,carbon tetrachloride retention less than 25% by weight of the carbon tetrachloride adsorbed mass,methylene blue: between 5 and 30 ml,particle size: between 0.5 and 1.5 mm effective size with a coefficient of uniformity less than 2.A washing cycle (21, 24) (air only; air plus water; water only) of the contactor is triggered (38) when a parameter (36, 37) representative of the population of algae in said layer reaches a predetermined set point threshold.
    Type: Grant
    Filed: December 4, 1989
    Date of Patent: August 6, 1991
    Assignee: Societe Pica - Produits Industriels et Charbons Actifs
    Inventors: Jean R. Montagnon, Guy P. Bablon, Gerard L. Dagois, Claire C. Ventresque