Patents by Inventor Klemenz Sprecher

Klemenz Sprecher 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 5-cyano-and 5-carboxamido-5H-dibenz[b,f]azepines
    Patent number: 4436660
    Abstract: The invention relates to a novel and technically advanced process for producing 5-cyano-5H-dibenz[b,f]azepine by reacting 5H-dibenz[b,f]azepine with a halocyanogen in the presence of strongly polar substances. 5-Cyano-5H-dibenz[b,f]azepine can be used as starting material for producing 5-carbamyl-10(11)-oxo-10,11-dihydro-5H-dibenz[b,f]azepine, which is known to have central-depressant, anticonvulsive and central-muscle-relaxing activity.
    Type: Grant
    Filed: May 14, 1982
    Date of Patent: March 13, 1984
    Assignee: Ciba-Geigy Corporation
    Inventors: Ernst Aufderhaar, Klemenz Sprecher, Janos Zergenyi