Patents by Inventor Hans P. Sehnem

Hans P. Sehnem 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 alkylthioacetamidines
    Patent number: 4713490
    Abstract: A process for the preparation of alkylthioacetamidines by the reaction of chloroacetonitrile with ammonium halide in the presence of a catalyst followed by reaction of the resultant chloroacetamidine with an alkyl mercaptan in the presence of an acid acceptor.
    Type: Grant
    Filed: November 27, 1985
    Date of Patent: December 15, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Arndt, Hans P. Sehnem
  • Preparation of menthyl permethrate
    Patent number: 4518791
    Abstract: A process for the preparation of menthyl permethrate comprises reacting methyl permethrate or ethyl permethrate with menthol in the presence of 1 to 30 mol % of an alkali metal alcoholate, relative to the methyl or ethyl permethrate.
    Type: Grant
    Filed: April 3, 1984
    Date of Patent: May 21, 1985
    Assignee: Bayer Aktiengesellschaft
    Inventor: Hans P. Sehnem
  • Process for the production of ethoxycarbonylmethyl 5-(2,6-dichloro-4-trifluoro-methylphenoxy)-2-nitro-.alpha.-phenoxy-propi onate
    Patent number: 4452992
    Abstract: A novel process for the preparation of ethoxycarbonylmethyl 5-(2,6-dichloro-4-trifluoromethyl-phenoxy-2-nitro-.alpha.-phenoxy-propiona te of the formula ##STR1## by reacting ethoxycarbonylmethyl 3-(2,6-dichloro-4-trifluoromethyl-phenoxy)-.alpha.-phenoxy-propionate of the formula ##STR2## with nitric acid in the presence of sulphuric acid and in the presence of 1,2-dichloroethane at a temperature between -20.degree. C. and +150.degree. C.
    Type: Grant
    Filed: January 13, 1983
    Date of Patent: June 5, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventor: Hans P. Sehnem