Patents by Inventor Ansgar Lerch

Ansgar Lerch 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).

  • 3-Alkyl-4-sulfamoyl-aniline therapeutic compositions
    Patent number: 3991188
    Abstract: New 3-alkyl-4-sulfamoyl-aniline compounds of the formula ##SPC1##WhereinR.sub.1 is phenyl, furyl or thienyl;R.sub.2 is carboxyl or tetrazolyl-(5)R.sub.4 is a straight-chain or branched alkyl radical of from 2 to 5 carbon atoms; andn is 1 or 2;And the pharmacologically compatible salts thereof; are outstandingly effective saluretic compounds, particularly when administered enterally.
    Type: Grant
    Filed: July 3, 1975
    Date of Patent: November 9, 1976
    Assignee: Boehringer Mannheim G.m.b.H.
    Inventors: Ansgar Lerch, Alfred Popelak, Kurt Stach, Egon Roesch, Klaus Hardebeck
  • Biphenyl compounds
    Patent number: 3959261
    Abstract: Novel biphenyl derivatives of the formula: ##SPC1##WhereinR.sub.1 is phenyl, furyl or thienyl; andR.sub.2 is carboxyl or tetrazolyl-(5);And the pharmacologically compatible salts thereof display outstanding diuretic and saluretic properties.
    Type: Grant
    Filed: June 25, 1974
    Date of Patent: May 25, 1976
    Assignee: Boehringer Mannheim GmbH
    Inventors: Ansgar Lerch, Alfred Popelak, Kurt Stach, Klaus Hardebeck, Wolfgang Schaumann