Patents by Inventor Helmut Klemp

Helmut Klemp 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).

  • 1-Hydroxy-omega-(alkyl- or arylphosphinico)alkane-1,1-diphosphonic acids, salts thereof, and processes for the preparation of these compounds
    Patent number: 4960928
    Abstract: The present invention relates to 1-hydroxy-.omega.-(alkyl- or arylphosphinico)alkane-1,1-diphosphonic acids of the general formula I ##STR1## and to the salts of these acids of the general formula II ##STR2## where, in these formulae, R.sup.1 denotes an alkyl radical having 1 to 6 carbon atoms, a cycloalkyl radical having 5 to 7 carbon atoms or an aryl radical having 6 to 10 carbon atoms, R.sup.2 denotes a straight-chain or branched alkylene radical having 1 to 6 carbon atoms and A denotes a monovalent equivalent of a cation of an inorganic or organic base. In addition, processes are described for the preparation of these novel compounds.
    Type: Grant
    Filed: February 9, 1989
    Date of Patent: October 2, 1990
    Assignee: Hoechst Aktiengesellschaft Knapsack
    Inventors: Werner Klose, Helmut Klemp