Patents by Inventor Noel J. DE Souza

Noel J. DE Souza 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: 5141942
    Abstract: Pharmaceutical compositions comprising labdane diterpenoid derivatives and pyrimido(6,1-a)-isoquinolin-4-one derivatives when administered to the skin of a mammal or of the man increase the rate of terminal hair growth, stimulate the conversion of vellus hair to growth as terminal hair and arrest hair loss. They can be used for the treatment of several kinds of alopecia.
    Type: Grant
    Filed: November 17, 1989
    Date of Patent: August 25, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Bansi Lal, Jurgen Blumbach, Alihussein N. Dohadwalla, Noel J. de Souza
  • Patent number: 4900727
    Abstract: The present invention relates to novel 4H-1-benzopyran-4-one derivatives, to processes for the preparation thereof and to their use as anti-inflammatory, analgesic, immuno-suppressive and anti-allergic agents. In particular, the present invention relates to novel compounds of the formula I, ##STR1## in which R.sub.1 is hydrogen, alkyl having 1 to 6 carbon atoms, arly-C.sub.1 -C.sub.4 -alkyl, substituted C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.6 -cycloalkyl, C.sub.3 -C.sub.6 -cycloalkyl-C.sub.1 -C.sub.4 -alkyl, C.sub.2 -C.sub.6 -alkenyl, C.sub.3 -C.sub.6 -alkynyl, aryl or carboxyl or an aldehyde or COO--C.sub.1 -C.sub.4 -alkyl group, R.sub.2 is hydrogen, alkyl having 1 to 6 carbon atoms, nitro, amino, di-C.sub.1 -C.sub.4 -alkylamino or a halogen, R.sub.3 is C.sub.1 -C.sub.4 -alkyl, substituted C.sub.1 -C.sub.4 -alkyl, hydroxyl, C.sub.1 -C.sub.4 -alkoxy, aryl-C.sub.1 -C.sub.4 -alkyl, nitro, amino, a C.sub.1 -C.sub.4 -alkylamino or di-C.sub.1 -C.sub.4 -alkylamino group or halogen, R.sub.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: February 13, 1990
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Samba L. Kattige, Ramchandra G. Naik, Aftab D. Lakdawalla, Alihussein N. Dohadwalla, Richard H. Rupp, Noel J. de Souza
  • Patent number: 4803204
    Abstract: The present invention relates to novel, 1-substituted 3-aryl-7-chloro-3,4-dihydro-(2H)-acridone N-oxides, a process for their preparation, pharmaceutical compositions containing these compounds, and their use as chemotherapeutic agents, in particular as antimalarials and coccidiostatics.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: February 7, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Rajkumar Dhar, Bindumadhavan Venugopalan, Dipak K. Chatterjee, Richard H. Rupp, Noel J. de Souza
  • Patent number: 4724238
    Abstract: The present invention relates to a process for the isolation of labdan derivatives from the plant Coleus forskohlii, and their use as medicaments having anti-inflammatory and analgesic activity.
    Type: Grant
    Filed: April 3, 1986
    Date of Patent: February 9, 1988
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Alihussein N. Dohadwalla, Sadashiv S. Mandrekar, Nandkumar K. Dadkar, Yatendra Khandelwal, Richard H. Rupp, Noel J. de Souza
  • Patent number: 4603137
    Abstract: The present invention relates to a compound of the formula ##STR1## and to a process for its isolation from plants of the family comprising the meliaceae. The compound has, in particular, immunosuppressive properties, and can therefore be used as a medicament.
    Type: Grant
    Filed: August 10, 1984
    Date of Patent: July 29, 1986
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Sujata V. Bhat, Virbala Shah, Alihussein N. Dohadwalla, Sadashiv M. Mandrekar, Noel J. de Souza, Gerhard Dickneite, Roland Kurrle, Hans-Ulrich Schorlemmer, Hans-Harald Sedlacek
  • Patent number: 4599409
    Abstract: The present invention relates to new bisamidine derivatives of polycyclic compounds such as 5,10-dioxo-4,5,9,10-tetrahydro-4,9-dioxapyrene-6(5H)-phenanthridone and 5,10-dioxo-4,5,9,10-tetrahydro-4,9-dioxapyrenephenanthridine and to a process for their preparation. The polycyclic bisamidines according to the invention are distinguished by valuable chemotherapeutic properties, such as, for example, an action against amoebas and trichomonads.
    Type: Grant
    Filed: February 15, 1984
    Date of Patent: July 8, 1986
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Balbir S. Bajwa, deceased, Dipak K. Chatterjee, Bimal N. Ganguli, Jurgen Reden, Noel J. de Souza
  • 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: 4578399
    Abstract: The possibility of using the diterpene derivative forskolin (1.alpha., 6.beta., 9.alpha.-trihydroxy-7.beta.-acetoxy-8,13-epoxy-14-labden-11-one) to increase the immunological responsiveness of mammals is described.
    Type: Grant
    Filed: April 24, 1984
    Date of Patent: March 25, 1986
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Ulrich Schorlemmer, Gerhard Dickneite, Hans-Harald Sedlacek, Noel J. de Souza, Alihussein N. Dohadwalla
  • 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: 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: 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: 3968122
    Abstract: Magnesidin, which comprises a mixture of the compounds of the general formula I ##SPC1##in which n is the integer 4 or 6, the magnesium-free form of Magnesidin, and the salts thereof with mono-or polyvalent cations, and a process for the preparation of Magnesidin which comprises cultivating pseudomonas magnesiorubra HPL No. Z-1190 (ATCC 21.856).
    Type: Grant
    Filed: August 15, 1974
    Date of Patent: July 6, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Julia Nazareth, Naren M. Gandhi, Pandurang V. Divekar, Noel J. DE Souza, Hans Kohl