Patents by Inventor Johannes Platzek

Johannes Platzek 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).

  • Substituted DTPA monoamides of the central carboxylic acid group and their metal complexes
    Patent number: 5676923
    Abstract: Diethylenetriaminepentaacetic acid monoamide derivatives, their complexes and complex salts, containing an element of atomic numbers 21-29, 31, 32, 39, 42-44, 49 or 57-83, pharmaceutical agents containing these compounds, their use as contrast media and process for their production.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 14, 1997
    Assignee: Schering Aktiengesellschaft
    Inventors: Johannes Platzek, Ulrich Niedballa, Peter Mareski, Bernd Raduchel, Hanns-Joachim Weinmann, Andreas Muhler, Bernd Misselwitz
  • Process for the production of DTPA-tetraesters of terminal carboxylic acids
    Patent number: 5676926
    Abstract: The invention relates to a process for the production of diethylenetriaminepentacarboxylic acid tetraesters of general formula I ##STR1## in which R.sup.1 and Z have different meanings.
    Type: Grant
    Filed: April 18, 1996
    Date of Patent: October 14, 1997
    Assignee: Schering Aktiengesellschaft
    Inventors: Johannes Platzek, Ulrich Niedballa, Bernd Radeuchel
  • Process for the production of C-substituted diethylenetriamines
    Patent number: 5654467
    Abstract: The invention relates to a process for the production of C-substituted diethylenetriamines of general formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 have different meanings.
    Type: Grant
    Filed: October 12, 1995
    Date of Patent: August 5, 1997
    Assignee: Schering Aktiengesellschaft
    Inventors: Orlin Petrov, Jean-Claude Hilscher, Klaus Nickisch, Heribert Schmitt-Willich, Heinz Gries, Bernd Raduchel, Johannes Platzek
  • Cascade polymer bound complexing compounds, their complexes and conjugates, processes for their production, and pharmaceutical agents containing them
    Patent number: 5650136
    Abstract: Cascade polymers, containing complex-forming ligands, optionally at least five ions of an element of atomic numbers 21-29, 39, 42, 44 or 57-83, as well as, if desired, cations of inorganic and/or organic bases, amino acids or amino acid amides, are valuable complexing compounds and complexes for diagnostics and therapy.
    Type: Grant
    Filed: December 2, 1994
    Date of Patent: July 22, 1997
    Assignee: Schering Aktiengesellschaft
    Inventors: Johannes Platzek, Heribert Schmitt-Willich, Heinz Gries, Gabriele Schuhmann-Giampieri, Hubert Vogler, Hanns-Joachim Weinmann, Hans Bauer
  • Process for the production of DTPA-tetraesters of terminal carboxylic acids
    Patent number: 5514810
    Abstract: The invention relates to a process for the production of diethylenetriaminepentacarboxylic acid tetraesters of general formula I ##STR1## in which R.sup.1 and Z have different meanings.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: May 7, 1996
    Assignee: Schering Aktiengesellschaft
    Inventors: Johannes Platzek, Ulrich Niedballa, Bernd Radeuchel
  • Process for the production of mono-N-substituted tetraaza macrocycles
    Patent number: 5410043
    Abstract: A new process for the production of mono-N-substituted tetraaza macrocycles, N-substituted-tri-N-carboxyalkyl tetraaza macrocycles, and/or metal complexes thereof is described.
    Type: Grant
    Filed: October 25, 1993
    Date of Patent: April 25, 1995
    Assignee: Schering Aktiengesellschaft
    Inventors: Johannes Platzek, Heinz Gries
  • Macrocyclic polyaza compounds containing 5 or 6 membered rings, process for producing them and pharmaceutical media containing them
    Patent number: 5403572
    Abstract: The macrocyclic compounds of the following formula I and IV, defined herein and their salts with inorganic and/or organic bases, amino acids or amino acid amides are valuable diagnostic and therapeutic agents.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: April 4, 1995
    Assignee: Schering Aktiengesellschaft
    Inventors: Heinz Gries, Bernd Raduchel, Johannes Platzek, Hanns-Joachim Weinmann, Wolf-Rudiger Press, Ulrich Speck
  • Process for the production of N-.beta.-hydroxyalkyl-tri-N-carboxyalkyl-1,4,7,10-tetraazacyclododecane and N-.beta.-hydroxyalkyl-tri-N-carboxyalkyl-1,4,8,11-tetraazacyclotetradeca ne derivatives and their metal complexes
    Patent number: 5386028
    Abstract: A process for the production of N-.beta.-hydroxyalkyl-tri-N-carboxyalkyl-1,4,7,10-tetraazacyclododecane and N-.beta.-hydroxyalkyl-tri-N-carboxyalkyl-1,4,8,11-tetraazacyclotetrade cane derivatives and their metal complexes is described.
    Type: Grant
    Filed: February 11, 1993
    Date of Patent: January 31, 1995
    Assignee: Schering Aktiengesellschaft
    Inventors: Ulf Tilstam, Helmut Borner, Klaus Nickisch, Heinz Gries, Johannes Platzek
  • Cascade polymer bound chelating compounds, their chelates and conjugates, processes for their production, and pharmaceutical agents containing them
    Patent number: 5364614
    Abstract: Cascade polymers, containing complex-forming ligands, optionally at least five ions of an element of atomic numbers 21-29, 39, 42, 44 or 57-83, as well as, if desired, cations of inorganic and/or organic bases, amino acids or amino acid amides, are valuable complexing compounds and complexes for diagnostics and therapy.
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: November 15, 1994
    Assignee: Schering Aktiengesellschaft
    Inventors: Johannes Platzek, Heribert Schmitt-Willich, Heinz Gries, Gabriele Schuhmann-Giampieri, Hubert Vogler, Hanns-Joachim Weinmann, Hans Bauer
  • Marcocyclic polyaza bicyclo compounds containing 5 or 6 membered rings, and method for MRI
    Patent number: 5334371
    Abstract: The macrocyclic compounds of the following formula I and IV, defined herein and their salts with inorganic and/or organic bases, amino acids or amino acid amides are valuable diagnostic and therapeutic agents.
    Type: Grant
    Filed: July 6, 1992
    Date of Patent: August 2, 1994
    Assignee: Schering Aktiengesellschaft
    Inventors: Heinz Gries, Bernd Raduchel, Johannes Platzek, Hanns-Joachim Weinmann, Wolf-Rudiger Press, Ulrich Speck
  • Mono-n-substituted 1,4,7,10-tetraazacyclododecane derivatives, process for their production and pharmaceutical agents containing these derivatives
    Patent number: 5277895
    Abstract: Tetraazacyclododecane compounds of general formula I ##STR1## in which E and Q are defined herein and their salts with inorganic and/or organic bases, amino acids or amino acid amides are valuable pharmaceutical agents.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: January 11, 1994
    Assignee: Schering Aktiengesellschaft
    Inventors: Johannes Platzek, Heinz Gries, Hanns-Joachim Weinmann, Wolf-Rudiger Press, Hubert Vogler