Patents by Inventor Bansi Lal

Bansi Lal 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).

  • Pyrimido(6-1-a)isoquinolin-4-one derivatives
    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
  • 9,10-substituted 2-mesitylimino-3-alkyl-3,4,6,7-tetra-hydro-2H-pyrimido(6,1-a)isoquinolin -4-ones, and their use as medicaments
    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
  • Pyrimido (6,1-a)isoquinolin-4-one derivatives
    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
  • Triazino(2,1-a)isoquinoline derivatives, compositions and their use as medicaments
    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
  • Processes for the manufacture of pyrimido[6,1-a]isoquinolinones
    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
  • Naphthoquinone compounds
    Patent number: 4042591
    Abstract: Disclosed are compounds of formula I ##STR1## WHERE R.sub.1 is a fused benzene or naphthalene nucleus, m is one or two and R.sub.2 and R.sub.3 have various significances, their production and use as pigments and disperse dyes.
    Type: Grant
    Filed: May 23, 1974
    Date of Patent: August 16, 1977
    Assignee: Sandoz Ltd.
    Inventor: Bansi Lal Kaul
  • Azo dyes having one or two triazinyl-or pyrimidyl-acetic acid ester or amide coupling component radicals
    Patent number: 4042577
    Abstract: Compounds of the formula ##STR1## in which R.sub.1 signifies a group of the formula --NH.sub.2, --NH--R.sub.4 or --O--R.sub.4, in which R.sub.4 signifies a (C.sub.1-8)alkyl radical, a (C.sub.5-8)cycloalkyl radical or an unsubstituted or substituted phenyl, naphthyl or heterocyclic radical,Each of R.sub.2 and R.sub.3, which may be the same or different, signifies a hydrogen atom, a hydroxyl, (C.sub.1-8)alkoxy, amino, (C.sub.5-8)cycloalkylamino, (C.sub.1-8)alkylamino, (C.sub.1:8)dialkylamino, phenyl- or naphthylamino or N-phenyl-N-(C.sub.1-8)alkylamino group,A signifies a nitrogen atom or a group of the formula ##STR2## in which R.sub.6 signifies a hydrogen or halogen atom or a (C.sub.1-8)alkyl radical,Either n is 1 and D signifies the radical of a diazo component,Or n is 2 and D signifies the radical of a tetrazo component,Are useful as coloring materials, especially as pigments for plastics, synthetic resins, varnishes, viscose, cellulose acetate, printing inks and paper stock.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: August 16, 1977
    Assignee: Sandoz Ltd.
    Inventor: Bansi Lal Kaul
  • Naphthoquinone derivatives
    Patent number: 4033963
    Abstract: The present invention relates to naphthoquinone derivatives of formula I, ##STR1## in which R.sub.1 signifies a halogen atom, a nitro group or an unsubstituted or substituted alkoxy or amino group,R.sub.2 signifies the atoms necessary to form an unsaturated ring system, which ring system has 1 or 2 nuclei and is unsubstituted or substituted,R.sub.3 signifies an unsubstituted or substituted 5-triazinyl or pyrimidyl radical, andn is 0, 1 or 2,Which compounds are free from sulphonic acid groups are useful as pigments or disperse dyes.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: July 5, 1977
    Assignee: Sandoz Ltd.
    Inventor: Bansi Lal Kaul
  • Naphthoquinone derivatives
    Patent number: 3931163
    Abstract: The present invention relates to naphthoquinone derivatives of formula I, ##SPC1##in whichR.sub.1 signifies a halogen atom, a nitro group or an unsubstituted or substituted alkoxy or amino group,R.sub.2 signifies the atoms necessary to form an unsaturated ring system, which ring system has 1 or 2 nuclei and is unsubstituted or substituted,R.sub.3 signifies an unsubstituted or substituted s-triazinyl or pyrimidyl radical, andn is 0, 1 or 2,Which compounds are free from sulphonic acid groups are useful as pigments or disperse dyes.
    Type: Grant
    Filed: October 30, 1973
    Date of Patent: January 6, 1976
    Assignee: Sandoz Ltd., (Sandoz AG)
    Inventor: Bansi Lal Kaul