Patents by Inventor Horst Dornauer

Horst Dornauer 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).

  • Patent number: 4598148
    Abstract: What are disclosed are pyrimido(6,1-a)isoquinolin-4-one compounds useful as hypotensive agents, bronchodilators, and anti-allergenics, intermediates useful in their preparation, and method for making the compounds and intermediates.
    Type: Grant
    Filed: September 19, 1984
    Date of Patent: July 1, 1986
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Bansi Lal, Horst Dornauer, Bani K. Bhattacharya, Alihussein N. Dohadwalla, Noel J. de Souza
  • Patent number: 4590197
    Abstract: 9,10-substituted-2-mesitylimino-3-alkyl-3,4,6,7-tetrahydro-2H-pyrimido-(6,1 -a)isoquinoline-4-ones and salts thereof having hypotensive and vasodilating properties.
    Type: Grant
    Filed: May 7, 1984
    Date of Patent: May 20, 1986
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Bansi Lal, Alihussein N. Dohadwalla, Vijay A. Aroskar, Nandkumar K. Dadkar, Horst Dornauer, Julius Mascarenhas, Noel J. deSouza
  • Patent number: 4482556
    Abstract: What are disclosed are pyrimido (6,1-a)isoquinolin-4-one compounds useful as hypotensive agents, bronchodilators, and anti-allergenics, intermediates useful in their preparation, and methods for making the compounds and intermediates.
    Type: Grant
    Filed: March 26, 1980
    Date of Patent: November 13, 1984
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Bansi Lal, Horst Dornauer, Bani K. Bhattacharya, Alihussein N. Dohadwalla, Noel J. de Souza
  • Patent number: 4479948
    Abstract: Hypotensively active triazino-(2,1-a)isoquinoline compounds having the ring system ##STR1## and methods of making and using such compounds.
    Type: Grant
    Filed: July 8, 1982
    Date of Patent: October 30, 1984
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Bansi Lal, Adolf D'Sa, Alihussein N. Dohadwalla, Noel J. de Souza, Horst Dornauer
  • Patent number: 4400506
    Abstract: What are disclosed are compounds of the formula ##STR1## wherein, X is oxygen, sulfur, or halogen, useful as intermediates in the preparation of certain pyrimido(6,1-a)isoquinolin-4-ones having pharmaceutical utilities, and methods for making said intermediates.
    Type: Grant
    Filed: October 26, 1981
    Date of Patent: August 23, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Bansi Lal, Adolf D'Sa, Horst Dornauer, Noel J. de Souza
  • Patent number: 4287212
    Abstract: Novel 2-aryl-1,2-dialkylcycloalkylamines, physiologically tolerable acid addition salts thereof, and a method of preparing the same are described. These compounds are useful as analgesic and diuretic agents.
    Type: Grant
    Filed: February 27, 1978
    Date of Patent: September 1, 1981
    Assignee: American Hoechst Corporation
    Inventors: Grover C. Helsley, Horst Dornauer, Larry Davis
  • Patent number: 4134986
    Abstract: The invention relates to novel polyoxygenated labdane derivatives and to a process for preparing same. The polyoxygenated labdane derivatives of the invention are characterized by valuable pharmacological properties, for example a hypotensive effect and a positive inotropic activity.
    Type: Grant
    Filed: April 15, 1977
    Date of Patent: January 16, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Balbir S. Bajwa, Sujata V. Bhat, Horst Dornauer, Noel J. DE Souza
  • Patent number: 4118508
    Abstract: This invention relates to a pharmacologically effective substance named Coleforsin, to a process for its preparation from plants belonging to the Labiatae family, and to pharmaceutical preparations containing it.
    Type: Grant
    Filed: April 26, 1977
    Date of Patent: October 3, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Sujata Vasudev Bhat, Noel John DE Souza, Horst Dornauer, Bani Kanta Bhattacharya, Alihussein Nomanbhai Dohadwalla
  • Patent number: 4088659
    Abstract: Extraction processes are described resulting in the isolation of a pharmacologically active substance from a plant of the Labiatae family. Chemical and physical properties of this compound are given in the specification. Because of its vasodilating and blood pressure lowering effect the compound is useful as a drug for the treatment of hypertension.
    Type: Grant
    Filed: December 17, 1976
    Date of Patent: May 9, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Sujata V. Bhati, Noel J. DE Souza, Horst Dornauer, Bani K. Bhattacharya, Alihusein N. Donadwalla
  • Patent number: 3939159
    Abstract: Spiro[pyrrolo(1,2-a)quinoxalines] and their physiologically tolerable acid addition salts possessing anticonvulsant and central nervous system depressant properties, and a process for their preparation are described.
    Type: Grant
    Filed: May 29, 1974
    Date of Patent: February 17, 1976
    Assignee: American Hoechst Corporation
    Inventors: Horst Dornauer, Vernon Brian Anderson