Patents by Inventor Robertson Towart

Robertson Towart 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).

  • 1,4-Dihydropyridazine compounds, and their medicinal use
    Patent number: 4360520
    Abstract: The invention includes new 1,4-dihydropyridazine compounds, compositions containing said 1,4-dihydropyridazine compounds and methods for the use of said compounds and compositions. Also included in the invention are methods for preparing the new 1,4-dihydropyridazine compounds.
    Type: Grant
    Filed: September 11, 1978
    Date of Patent: November 23, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Horst Meyer, Gerhard Franckowiak, Friedrich Bossert, Arend Heise, Stanislav Kazda, Kurt Stoepel, Robertson Towart, Egbert Wehinger
  • 1,4-Dihydropyridazine compounds
    Patent number: 4348395
    Abstract: The invention includes, as novel compounds, 1,4-dihydropyridazines and methods for their preparation. Also included are compositions containing said compounds and methods for the use of said compounds and compositions. The compounds of the invention are active as circulation-influencing and spasmolytically active agents.
    Type: Grant
    Filed: October 4, 1978
    Date of Patent: September 7, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerhard Franckowiak, Horst Meyer, Friedrich Bossert, Arend Heise, Stanislav Kazda, Kurt Stoepel, Robertson Towart, Egbert Wehinger
  • 1,4-Dihydropyridazine-3-carboxylic acid derivatives, a process for their preparation and their use as antihypertensives
    Patent number: 4280998
    Abstract: The invention relates to 1,4-dihydro-pyridazine-3-carboxylic acid derivatives and compositions containing said derivatives. Also included in the invention are methods for the manufacture and use of said compounds and compositions. The derivatives of the invention influence the circulation and have a spasmolytic and anti-inflammatory action.
    Type: Grant
    Filed: July 18, 1979
    Date of Patent: July 28, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerhard Franckowiak, Friedrich Bossert, Arend Heise, Robertson Towart
  • Nitro-substituted 1,4-dihydropyridines, processes for _their production and their medicinal use
    Patent number: 4248873
    Abstract: The invention includes novel nitro-substituted 1,4-dihydropyridines useful because of their influence on the circulation. Also included in the invention are methods for the preparation of said novel nitro-substituted 1,4-dihydropyridines, compositions containing them and methods for the use of said compounds and compositions.
    Type: Grant
    Filed: November 6, 1978
    Date of Patent: February 3, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Friedrich Bossert, Gerhard Franckowiak, Arend Heise, Stanislav Kazda, Horst Meyer, Kurt Stoepel, Robertson Towart, Egbert Wehinger
  • Sila-substituted 1,4-dihydropyridine derivatives and their medicinal use
    Patent number: 4237137
    Abstract: The invention provides sila-substituted 1,4-dihydropyridine derivatives useful as medicament which influence the circulation. Also included in the invention are methods for the procurement of said derivatives, compositions containing said derivatives and methods for the use of said derivatives.
    Type: Grant
    Filed: August 8, 1979
    Date of Patent: December 2, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhold Tacke, Anke Bentlage, Robertson Towart, Wulf Vater
  • 1,4-Dihydropyridine derivatives substituted in the 2 position, and their use as medicaments
    Patent number: 4188395
    Abstract: The present invention provides 1,4-dihydropyridine derivatives of the formula in which ##STR1## R represents hydrogen, alkyl, alkenyl, alkoxyalkyl, aryl or aralkyl, the alkyl and aryl groups being optionally substituted,A represents a straight-chain or branched alkylene radical,R.sup.1 represents (a) an optionally substituted alkylthio group or (b) a group of the formula O--CO-alkyl, O--CO-aryl or O--CO-aralkyl, the alkyl and aryl groups being optionally substituted or (c) a phthalimido radical which is optionally substituted in the benzene ring, Y and Z are identical or different and each represents a group of the formula COOR.sup.2 or COR.sup.2,whereinR.sup.2 represents alkyl, alkenyl, alkinyl, alkoxyalkyl, hydroxyalkyl, aminoalkyl, alkylaminoalkyl or aralkyl, the alkyl and aryl radicals being optionally substituted, orY and Z are identical or different and each represents a cyano radical or a radical of the formula S(O).sub.n --R.sup.3,whereinR.sup.
    Type: Grant
    Filed: December 1, 1977
    Date of Patent: February 12, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Friedrich Bossert, Egbert Wehinger, Horst Meyer, Arend Heise, Stanislav Kazda, Kurt Stoepel, Robertson Towart, Wulf Vater, Klaus Schlossmann
  • 2-Alkyleneaminodihydropyridines compounds, their production and their medicinal use
    Patent number: 4177278
    Abstract: The invention includes the provision of 2-alkyleneaminodihydropyridines and salts thereof and are useful, inter alia, as coronary dilators and antihypertensive agents. Also included in the invention are pharmaceutical compositions containing said 2-alkyleneaminodihydropyridines and methods of treatment involving the use of said compounds or compositions.
    Type: Grant
    Filed: March 15, 1978
    Date of Patent: December 4, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Friedrich Bossert, Egbert Wehinger, Arend Heise, Stanislav Kazda, Kurt Stoepel, Robertson Towart, Wulf Vater, Klaus Schlossmann