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).
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Patent number: 6462128Abstract: A new pigment for making colored finely divided particles on aminoformaldehyde resin allows to produce particles of substantially uniform particle size and spherical or irregular shape having excellent dispersibility and superior opacity.Type: GrantFiled: July 14, 2000Date of Patent: October 8, 2002Assignee: Clariant International Ltd.Inventors: Nikolay N. Barashkov, Thomas C. Molloy, Bansi Lal Kaul, Jean-Christophe G. Graciet
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Patent number: 6441088Abstract: Synthetic polyamide comprising one or more of the following compounds: a) a compound having at least one sterically hindered amino group, [hereinafter referred to as compounds a)]; or b) a trimesinic acid trialkylamide, at least one alkyl group of which bears at least one free amino and/or alkylamino group [hereinafter referred to as compounds b)]; or c) a trialkylamino-substituted triazine, at least one alkyl group of which carries a free amino and/or alkylamino group [hereinafter referred to as compounds c)]; or d) a dyestuff that is free of sulphonic acid groups and contains at least one group that is reactive to a hydroxy and/or amino group [hereinafter referred to as compounds d)]; or e) a synthetic polyamide containing at least one group that is reactive with a hydroxy and/or amino group [hereinafter referred to as compounds e)].Type: GrantFiled: September 22, 2000Date of Patent: August 27, 2002Assignee: Clariant Finance (BVI) LimitedInventors: Bansi Lal Kaul, Angelos Elie Vougioukas
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Publication number: 20020112297Abstract: This invention relates to new fluorescent or non-fluorescent dye compounds having a terminal hydroxy, carboxylic acid/ester or amino group and a process for their preparation.Type: ApplicationFiled: July 13, 2001Publication date: August 22, 2002Applicant: CLARIANT FINANCE (BVI) LIMITEDInventors: Bansi Lal Kaul, Jean-Christophe Graciet
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Patent number: 6375732Abstract: Hybrid pigments of diketopyrrolo[3,4-c]pyrrole pigments and pigments bearing “acid” hydrogens like —NH, —OH or —CONH— groups, a process for the manufacturing of the hybrid diketopyrrolo[3,4-c]pyrrole pigments with pigments bearing “acid” hydrogens like —NH, — OH or —CONH— groups and their use as a pigment.Type: GrantFiled: March 30, 2000Date of Patent: April 23, 2002Assignee: Clariant Finance (BVI) LimitedInventors: Bansi Lal Kaul, Bruno Piastra, Valérie Wolf
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Patent number: 6355795Abstract: The triphendioxazine compounds of the general formula (I) in which the rings labelled A in positions 1,2-, 2,3- or 3,4- and 8,9-, 9,10- or 10,11- carry a linearly or angularly fused heterocyclic ring containing at least one nitrogen atom which is substituted or unsubstituted, with the proviso that compounds with only unsubstituted nitrogen atoms and symmetrically disubstituted compounds with C1-2alkyl and unsubstituted phenyl substituents are excluded, are outstanding pigments and are notable over the closest comparable pigments in particular for better migration, light and solvent fastnesses, better heat stability and enhanced coloring power and also better dispersibility and capability to be brought into pigment form. The invention also relates to a process for preparing these triphendioxazine compounds which is characterized by a cyclization step conducted in the presence of manganese dioxide and concentrated sulphuric acid.Type: GrantFiled: May 31, 2000Date of Patent: March 12, 2002Assignee: Clariant Finance (BVI) LimitedInventors: Patrick Boeglin, Bansi Lal Kaul, Peter Kempter
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Patent number: 6348562Abstract: A process of increasing the melt processing of synthetic polyamides, in particular pigmented and/or filled synthetic polyamide, by adding thereto an additive having the formula (I) wherein R1 represents a methyl group as such or in the form of a stabilizer masterbatch composition. The invention also relates to modified synthetic polyamides obtainable by this process having improved properties due to the stabilization effect of the compound of the above formula (I).Type: GrantFiled: January 13, 1999Date of Patent: February 19, 2002Assignee: Clariant Finance (BVI) LimitedInventors: Bansi Lal Kaul, Jan Malik, Mohamed Sidqi
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Patent number: 6339084Abstract: A process of forming the cis- or the trans-isomers of thiazine-indigo compounds comprising the step of reacting o-aminomercapto-carbocyclic or -heterocyclic compounds with a maleic acid or fumaric acid derivative in the presence of an aqueous system. The invention further relates to a process of converting cis-isomers of thiazine-indigo compounds into the trans-isomers being pigments. The invention also relates to the cis-isomers of thiazine-indigo compounds of formula I as defined in claim 14 which are new compounds.Type: GrantFiled: July 19, 2000Date of Patent: January 15, 2002Assignee: Clariant Finance (BVI) LimitedInventors: Bansi Lal Kaul, Bruno Piastra
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Publication number: 20010031864Abstract: The invention relates to a process for preparing triphendioxazine compounds by cyclizing the intermediates (IV) 1Type: ApplicationFiled: March 6, 2001Publication date: October 18, 2001Applicant: CLARIANT FINANCE (BVI) LIMITEDInventors: Bansi Lal Kaul, Bruno Piastra, Pascal Steffanut
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Patent number: 6277536Abstract: Compounds of the formula (I) in which the substituents are as defined in claim 1 are valuable colorants for the mass coloring of polymers, with fluorescence property, in electrophotographics toners and developers, in powders coating materials and ink-jet inks.Type: GrantFiled: November 3, 1999Date of Patent: August 21, 2001Assignee: Clariant Finance (BVI) LimitedInventors: Bruno Piastra, Bansi Lal Kaul, Jean Christoph Graciet
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Patent number: 6255482Abstract: The triphendioxazine compounds of the general formula (I) in which the rings labelled A in positions 1,2-, 2,3- or 3,4- and 8,9-, 9,10- or 10,11- carry a linearly or angularly fused heterocyclic ring containing at least one nitrogen atom which is substituted or unsubstituted, with the proviso that compounds with only unsubstituted nitrogen atoms and symmetrically disubstituted compounds with C1-2alkyl and unsubstituted phenyl substituents are excluded, are outstanding pigments and are notable over the closest comparable pigments in particular for better migration, light and solvent fastnesses, better heat stability and enhanced colouring power and also better dispersibility and capability to be brought into pigment form. The invention also relates to a process for preparing these triphendioxazine compounds which is characterized by a cyclization step conducted in the presence of manganese dioxide and concentrated sulphuric acid.Type: GrantFiled: October 19, 1998Date of Patent: July 3, 2001Assignee: Clariant Finance (BVI) LimitedInventors: Patrick Boeglin, Bansi Lal Kaul, Peter Kempter
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Patent number: 6214989Abstract: Carbamate group-containing triphendioxazine compounds of the formula (I) where the nuclei designated A and B, as defined in claim 1, contain fused-on rings and R1, R2 and R3 have the meanings specified in claim 1, are good pigments and are convertible into the corresponding triphendioxazine pigments without carbamate groups.Type: GrantFiled: March 24, 1999Date of Patent: April 10, 2001Assignee: Clariant International, Ltd. MuttenzInventors: Bansi Lal Kaul, Bruno Piastra
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Patent number: 6200378Abstract: A compound according to the formula (I) wherein R1 and R2 are independently the atoms necessary to complete the formation of a substituted or unsubstituted aromatic or aliphatic carbocyclic or heterocyclic ring system and R3 and R4 have the meaning indicated in claim 1, a new process for the preparation of such a compound, solid solutions and mixtures comprising such a compound and the use of a compound of formula (I) as a pigment.Type: GrantFiled: July 23, 1999Date of Patent: March 13, 2001Assignee: Clariant Finance (BVIØ) LimitedInventors: Bruno Piastra, Bansi Lal Kaul
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Patent number: 6162261Abstract: The invention relates to triphendioxazine compounds of the formula (I) ##STR1## where the rings marked with A comprise, independently of one another, rings which are fused linearly in positions 2,3 and 9,10 or angularly in positions 1,2 and 8,9 or 3,4 and 10,11 and have the radical members of the formula (i) --NR.sub.1 (CO).sub.m --NH--, (ii) --CR.sub.1 .dbd.CH--CO--NH--, (iii) --O--CH.sub.2 --CO--NH--, (iv) --CO--CH.dbd.CR.sub.1 --NH--, (v) --CO--NH--CO--NH--, (vi) --CO--NH--CR.sub.2 .dbd.N--, (vii) --CR.sub.2 .dbd.N--CO--NH--, (viii) --NR.sub.1 --(CO).sub.m --O--, (ix) --NH--CR.sub.1 .dbd.N--, (x) --NH--CO--CR.sub.1 .dbd.N--, (xi) --NH--CO--CHR.sub.1 --NH--, (xii) --NR.sub.3 --(CO).sub.m --NR.sub.4 --, (xiii) --NR.sub.5 --(CO).sub.m --NR.sub.6 --, (xiv) --NR.sub.4 --CO--O-- or (xv) --NR.sub.6 --CO--O--,m is 1 or 2,R.sub.1 is hydrogen, C.sub.1-4 alkyl or phenyl, preferably hydrogen, methyl or ethyl,R.sub.2 is hydrogen, C.sub.1-4 alkyl or phenyl, preferably hydrogen, methyl or ethyl,R.sub.3, R.sub.4, R.sub.Type: GrantFiled: June 24, 1998Date of Patent: December 19, 2000Assignee: Clariant Finance (BVI) LimitedInventors: Peter Kempter, Bansi Lal Kaul
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Patent number: 6159988Abstract: Compounds of formula I, ##STR1## and the physiologically tolerable salts thereof, wherein the substituents R.sub.1 -R.sub.4 have the meanings given in the specifications and show an activity against inflammatory conditions.Type: GrantFiled: June 29, 1998Date of Patent: December 12, 2000Assignee: Hoeschst AktiengesellschaftInventors: Ramachandra Ganapati Naik, Vilas Narayan Mumbaikar, Ravishankar Vasumathy, Aftab Dawoodbhai Lakdawala, Mandakini Bipin Alreja, Bansi Lal, Jurgen Blumbach, Klaus Ulrich Weithmann, Robert Ryder Bartlett, Kalpana Sanjay Joshi, Swati Bal-Tembe, Sadagopan Raghavan
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Patent number: 6132894Abstract: A compound of formula (I) or a mixture thereof ##STR1## The compounds are useful as solvent dyestuffs and exhibit high solubility in alcoholic solvents, e.g. ethanol.Type: GrantFiled: February 3, 1999Date of Patent: October 17, 2000Assignee: Clariant Finance (BVI) LimitedInventors: Bansi Lal Kaul, Dominique Pflieger
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Patent number: 6087304Abstract: Substituted 2-naphthoylguanidines, process for their preparation, their use as a medicament or diagnostic, and medicament containing themSubstituted 2-naphthoylguanidines of the formula I ##STR1## having the meanings indicated in claim 1 for R1 to R8, are suitable as antiarrhythmic pharmaceuticals having a cardioprotective component for infarct prophylaxis and infarct treatment and for the treatment of angina pectoris. They also preventively inhibit the pathophysiological processes in the formation of ischemically induced damage, in particular in the production of ischemically induced cardiac arrhythmias.Type: GrantFiled: May 16, 1997Date of Patent: July 11, 2000Assignee: Hoechst AktiengesellschaftInventors: Joachim Brendel, Heinz-Werner Kleemann, Heinrich Christian Englert, Hans Jochen Lang, Jan-Robert Schwark, Andreas Weichert, Bansi Lal
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Patent number: 6046335Abstract: Compounds of the formula (I) ##STR1## in which R.sub.1 and R.sub.2 are identical or different and are hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.6 -C.sub.10 -aryl, (C.sub.6 -C.sub.10)-aryl-(C.sub.1 -C.sub.6)-alkyl or (C.sub.1 -C.sub.6)-alkyl-(C.sub.6 -C.sub.10)-aryl, it being possible for the alkyl and/or aryl radicals to be substituted by hydroxyl, C.sub.1 -C.sub.6 -alkoxy, C.sub.6 -C.sub.10 -aryloxy or halogen,with the proviso that R.sub.1 and R.sub.2 are not simultaneously hydrogen,R.sub.3 is a radical of the formula (II) or (III) ##STR2## in which Y and R.sub.5 are as defined in the description, are valuable colorants for the mass coloring of polymers, in electrophotographic toners and developers, in powder coating materials and in ink-jet inks.Type: GrantFiled: October 19, 1998Date of Patent: April 4, 2000Assignee: Clariant BVIInventors: Patrick Boeglin, Bansi Lal Kaul, Bruno Piastra
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Patent number: 6024771Abstract: Mixtures of 2:1 Aluminium complexes of the type (Ic) are useful as solvent dyes.Type: GrantFiled: November 13, 1998Date of Patent: February 15, 2000Assignee: Clariant Finance (BVI) LimitedInventors: Dominique Pflieger, Bansi Lal Kaul
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Patent number: 5965716Abstract: A salt of formula IF.sub.n.A (I)in which F is the residue of a metal free anionic dyestuff having 1 to 4 acids groups,n is 1 to 2; andA is a group containing 1 to 4 sterically hindered amine groups and at least n ammonium or immonium groups.Type: GrantFiled: April 25, 1997Date of Patent: October 12, 1999Assignee: Clariant Finance (BVI) LimitedInventors: Bansi Lal Kaul, Angelos-Elie Vougioukas
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Patent number: 5932640Abstract: 1. Synthetic polyamide comprising one or more of the following compounds:a) a compound having at least one sterically hindered amino group, ?hereinafter referred to as compounds a)!; orb) a trimesinic acid trialkylamide, at least one alkyl group of which bears at least one free amino and/or alkylamino group ?hereinafter referred to as compounds b)!; orc) a trialkylamino-substituted triazine, at least one alkyl group of which carries a free amino and/or alkylamino group ?hereinafter referred to as compounds c)!; ord) a dyestuff that is free of sulphonic acid groups and contains at least one group that is reactive to a hydroxy and/or amino group ?hereinafter referred to as compounds d)!; ore) a synthetic polyamide containing at least one group that is reactive with a hydroxy and/or amino group ?hereinafter referred to as compounds e)!.Type: GrantFiled: June 25, 1997Date of Patent: August 3, 1999Assignee: Clariant Finance (BVI) LimitedInventors: Bansi Lal Kaul, Angelos Elie Vougioukas