Patents by Inventor Pierre Versproumy

Pierre Versproumy 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).

  • Processes for preparing pesticidal intermediates
    Patent number: 6410737
    Abstract: Compounds of formula (I) are prepared by hydrogenolysis of a compound of formula (II): where R1 is haloalkyl, haloalkoxy or −SF5; W is N or CR3; and R2 and R3 are H or Cl. The compounds of formula (I) can be used as intermediates in the preparation of pesticidally active arylpyrazole compounds.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: June 25, 2002
    Assignee: Aventis CropScience, S.A.
    Inventors: Jean-Erick Ancel, Gilles Perrin-Janet, Manuel Vangelisti, Pierre Versproumy