Patents by Inventor Oskar Ehrmann

Oskar Ehrmann 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).

  • Resolution of racemic verapamil
    Patent number: 5457224
    Abstract: A process for the resolution of racemic verapamil which comprises reacting the free base of the compound with optically active dibenzoyltartaric acid or ditoluoyltartaric acid in the molar ratio from 1:1 to 1:2 in a methanol/water mixture in the ratio from 1:1 to 3:1 or acetone/water mixture in the ratio from 0.5:1 to 2:1, separating the mixture of diastereomers obtained in this way by crystallization, and then converting the diastereomers into the free bases and these into their salts, if required, with physiologically tolerated acids.
    Type: Grant
    Filed: June 7, 1994
    Date of Patent: October 10, 1995
    Assignee: Knoll Aktiengesellschaft
    Inventors: Oskar Ehrmann, Herbert Nagel
  • Phenylacetonitriles which are substituted by basic groups, their preparation and drugs containing these substances
    Patent number: 4968717
    Abstract: Compounds of the formula ##STR1## where R.sup.1 to R.sup.7, m, n and p have the meanings stated in the description, and certain derivatives which are p-substituted in the left-hand phenyl ring, are useful for the treatment of disorders.
    Type: Grant
    Filed: May 12, 1989
    Date of Patent: November 6, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Liliane Unger, Manfred Raschack, Verena Baldinger, Ferdinand Dengel, Oskar Ehrmann, Hans J. Treiber, Werner Seitz
  • .OMEGA.-Cyano-1, .OMEGA.-diphenyl-azaalkane derivatives, their preparation and drugs containing them
    Patent number: 4438131
    Abstract: .omega.-Cyano-1,.omega.-diphenyl-azaalkane derivatives of the formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8, m and n have the meanings given in the description, and salts thereof with physiologically tolerated acids, are useful in treating cardiovascular disorders.
    Type: Grant
    Filed: March 30, 1982
    Date of Patent: March 20, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Oskar Ehrmann, Manfred Raschack, Josef Gries, Rolf Kretzschmar, Hans D. Lehmann, Ludwig Friedrich, Dirk Wuppermann, Frank Zimmermann, Werner Seitz, Hans J. Treiber, Ferdinand Dengel, Wolfram Frank, Hans-Georg Kurbjuweit, Claus D. Mueller