Patents by Inventor Albercht Marhold

Albercht Marhold 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).

  • Preparation of halogenated 4-aminophenols
    Publication number: 20080139795
    Abstract: The present invention relates to halogenated 4-aminophenols and to halogenated 4-(phenyldiazenyl)phenols, to a process for their preparation and to the use of the halogenated 4-hydroxyphenols for preparing active ingredients, especially in pharmaceuticals and agrochemicals.
    Type: Application
    Filed: January 28, 2008
    Publication date: June 12, 2008
    Inventors: Karen Peilstocker, Albercht Marhold, Jens-Peter Joschek
  • Herbicidal 5-dichloroacetamido-4-nitro-1-aryl-pyrazoles
    Patent number: 4909832
    Abstract: 5-Dichloracetamido-4-nitro-1-aryl-pyrazoles of the formula ##STR1## in which R.sup.1 represents hydrogen, fluorine, chlorine or bromine,R.sup.2 represents hydrogen, fluorine or chlorine,R.sup.3 represents halogen, halogenoalkyl, halogenoalkoxy, halogenoalkythio or halogenoalkylsulphonyl,R.sup.4 represents hydrogen, fluorine, or chlorine, andR.sup.5 represents fluorine, chlorine or bromine, but in the case in which R.sup.1 and R.sup.5 simultaneously represent chlorine and in addition R.sup.2 and R.sup.4 simultaneously represent hydrogen, R.sup.3 does not represent chlorine or trifluoromethyl,exhibit herbicidal and plant growth-regulating properties. Novel intermediates therefor are also shown.
    Type: Grant
    Filed: April 2, 1988
    Date of Patent: March 20, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhold Gehring, Otto Schallner, Jorg Stetter, Albercht Marhold, Hans-Joachim Santel, Robert R. Schmidt, Klaus Lurssen