Patents by Inventor Jean L. Guy

Jean L. Guy 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).

  • Centrifugal evaporator-concentrator for concentrating specimens by evaporation of the solvent
    Patent number: 5217572
    Abstract: The centrifugal evaporator-concentrator includes a central tubular pivot (18) surmounted by a nozzle (35) and constituting the pivot axis of a rotor (9) rotating in a vessel (8) closed by a cover (11). With the rotor rotating in the partial vacuum created by a vacuum pump (33), a small quantity of gas or air is temporarily and periodically admitted into the vessel, this gas being heated by a heating resistor (38) inside the vessel for the purpose of heating by conduction the specimens to be concentrated and of accelerating the rate of evaporation.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: June 8, 1993
    Assignee: Jouan
    Inventors: Jean L. Guy, Michel Serveau
  • Process for concentrating specimens by evaporation of the solvent with a centrifugal evaporator-concentrator
    Patent number: 5084133
    Abstract: The centrifugal evaporator-concentrator comprises a central tubular pivot (18) surmounted by a nozzle (35) and constituting the pivot axis of a rotor (9) rotating in a vessel (8) closed by a cover (11). With the rotor rotating in the partial vacuum created by a vacuum pump (33), a small quantity of gas or air is temporarily and periodically admitted into the vessel, this gas being heated by a heating resistor (38) inside the vessel for the purpose of heating by conduction the specimens to be concentrated and of accelerating the rate of evaporation.
    Type: Grant
    Filed: March 12, 1990
    Date of Patent: January 28, 1992
    Assignee: Jouan
    Inventors: Jean L. Guy, Michel Serveau