Patents by Inventor Klaus H. von Locquenghien

Klaus H. von Locquenghien 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 N-hydroxyazoles
    Patent number: 5332830
    Abstract: N-Hydroxyazoles of the general formula I ##STR1## where A is ##STR2## and R.sup.1, R.sup.2 and R.sup.3 are each hydrogen, C.sub.1 -C.sub.4 -alkyl or halogen, are prepared by a process in which an azole of the general formula II ##STR3## where A, R.sup.1, R.sup.2 and R.sup.3 have the abovementioned meanings, is reacted with hydrogen peroxide or an alkyl peroxide in the presence of a zeolite catalyst at from -20.degree. to 150.degree. C. and from 0.1 to 150 bar.
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: July 26, 1994
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus H. von Locquenghien, Wolfgang Hoelderich, Ulf Baus, Wolfgang Reuther, Erwin Hahn