Patents by Inventor Juerg Gustav Wiss

Juerg Gustav Wiss 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 the production of pyrazoles
    Patent number: 8124787
    Abstract: A process for the production of a compound of formula (I), which comprises a) reacting a compound of formula (II), wherein R1 and R2 are both independently C1-C6 alkyl, with methylhydrazine in the presence of water and a water-immiscible organic solvent being inert in saponification reactions, to form a compound of formula (III) wherein R1 is as defined for formula (II) and b) saponifying that compound in situ leading to the formation of the compound of formula (I) by b1) adding a base to form the anion of the compound of formula (I) and then adding an; acid to form the compound of formula (I); or b2) adding an acid to form the compound of formula (I).
    Type: Grant
    Filed: May 13, 2008
    Date of Patent: February 28, 2012
    Assignee: Syngenta Crop Protection, Inc.
    Inventors: Fanny Giordano, Thomas Vettiger, Juerg Gustav Wiss, Linhua Wang
  • PROCESS FOR THE PRODUCTION OF PYRAZOLES
    Publication number: 20100174093
    Abstract: A process for the production of a compound of formula (I), which comprises a) reacting a compound of formula (II), wherein R1 and R2 are both independently C1-C6 alkyl, with methylhydrazine in the presence of water and a water-immiscible organic solvent being inert in saponification reactions, to form a compound of formula (III) wherein R1 is as defined for formula (II) and b) saponifying that compound in situ leading to the formation of the compound of formula (I) by b1) adding a base to form the anion of the compound of formula (I) and then adding an; acid to form the compound of formula (I); or b2) adding an acid to form the compound of formula (I).
    Type: Application
    Filed: May 13, 2008
    Publication date: July 8, 2010
    Applicant: SYNGENTA CROP PROTECTION, INC.
    Inventors: Fanny Giordano, Thomas Vettiger, Juerg Gustav Wiss