Patents by Inventor Joel G. Fourreau

Joel G. Fourreau 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).

  • Device for preserving sterility during sampling from culture medium containers
    Patent number: 4957706
    Abstract: A device for preserving sterility during the taking of samples for analysis from culture medium containers. This device comprises a holder containing a sampling chamber which encloses a sliding piston fitted at one end with a toric cavity for removal of the sample for analysis, and a dilution chamber linked to the first chamber by a duct. The second chamber is divided into two parts by a central bearing and contains two sliding pistons which may abut respectively the opposite sides of the bearing. The second chamber comprises an inlet for the dilution solvent.
    Type: Grant
    Filed: May 21, 1987
    Date of Patent: September 18, 1990
    Assignee: Centre National de la Recherche Scientifique
    Inventors: Jean-Louis Romette, Joel G. Fourreau