Patents by Inventor Denis Blaser

Denis Blaser 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 preparation of substituted pyridines
    Patent number: 6133447
    Abstract: 2-chloro-3-hydroxypyridine is prepared by reacting 3-hydroxypyridine with aqueous sodium hypochlorite.
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: October 17, 2000
    Assignee: Novartis Crop Protection, Inc.
    Inventors: Dominik Faber, Denis Blaser, Thierry Bourquard, Andrea Rolf Sting, Dean Kent Hoglen
  • Process for the preparation of O-substituted oximes
    Patent number: 5434306
    Abstract: The invention relates to a process for the hydroxyalkylation of aldoximes and ketoximes by reacting said oximes with unsubstituted or substituted ethylene or propylene carbonate in the presence of a catalyst, which comprises the use of catalytic amounts of a N-alkylated, stable, organic amidinc base or a pyridine which is substituted by a secondary amino group. The compounds are important intermediates for the synthesis of herbicides.
    Type: Grant
    Filed: November 3, 1994
    Date of Patent: July 18, 1995
    Assignee: Ciba-Geigy Corporation
    Inventor: Denis Blaser