Patents by Inventor Peter Kempter
Peter Kempter 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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Publication number: 20110098466Abstract: The invention relates to a process for the preparation of compounds of the general formula (I) where X are halogen atoms, the rings labeled A are linearly or angularly fused in position 1,2; 2,3 or 3,4, and in position 8,9; 9,10 or 10,11, to a 5- or 6-membered heterocyclic ring containing in the ring one nitrogen atom and one oxygen atom, or containing in the ring two nitrogen atoms, comprising an oxidation of a 3,6-bisarylamino-2,5-dihalobenzoquinone of the formula (II) in an aprotic-polar organic solvent in the presence of an organic sulfonic acid.Type: ApplicationFiled: June 12, 2006Publication date: April 28, 2011Applicant: CLARIANT FINANCE (BVI) LIMITEDInventors: Peter Kempter, Wilhelm Streck
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Patent number: 7686883Abstract: A pigment preparation which is characterized by a content in a) a benzimidazolonedioxazine compound of formula (I) as base pigment and b) a dioxazine compound of the general formula (IV) as pigment dispersant wherein Q represents an m-valent radical of a compound of formula (III), wherein m is a number from 1 to 4.Type: GrantFiled: April 29, 2006Date of Patent: March 30, 2010Assignee: Clariant Produkte (Deutschland) GmbHInventors: Peter Kempter, Sven Antes, Herbert Graf, Magali Meder
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Publication number: 20090121202Abstract: A pigment preparation which is characterized by a content in a) a benzimidazolonedioxazine compound of formula (I) as base pigment and b) a dioxazine compound of the general formula (IV) as pigment dispersant wherein Q represents an m-valent radical of a compound of formula (III), wherein m is a number from 1 to 4.Type: ApplicationFiled: April 29, 2006Publication date: May 14, 2009Inventors: Peter Kempter, Sven Antes, Herbert Graf, Magali Meder
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Patent number: 6762299Abstract: A mixed crystal of two or more different benzimidazolonedioxazine compounds of the formula (1) where X and X′ are identical or different and are hydrogen or halogen, R1, R1′, R2 and R2′ are identical or different and are hydrogen, C1-C18 alkyl, trifluoromethyl, C1-C18 alkylcarbonyl, C5-C6 cycloalkyl or phenyl which may be unsubstituted or substituted by one or more halogen atoms, nitro groups, trifluoromethyl, C1-C18 alkyl, C1-C18 alkoxy, C1-C18 alkylcarbonyl and/or C1-C18 alkoxycarbonyl groups. The mixed crystals are of low solubility and feature good fastness properties and red to blue colorations. The mixed crystals are suitable for pigmenting paints, plastics, printing inks, aqueous or solvent-based pigment preparations, electrophotographic toners and developers, powder coating materials, inks, preferably inkjet inks, color filters, and for coloring seed and cosmetics.Type: GrantFiled: October 24, 2001Date of Patent: July 13, 2004Assignee: Clariant GmbHInventors: Martin U. Schmidt, Peter Kempter, Carsten Plueg, Roland Born
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Patent number: 6620931Abstract: Process for phase conversion of a methyl-substituted, benzimidazolone-fused dioxazine pigment of composition C22H12Cl2N6O4 having the formula (1) or of an isomer or tautomer thereof, which comprises treating the pigment of formula (1) with certain organic solvents. In the course of this phase conversion, 4 novel crystal polymorphs are formed which are called phases II, IV, V and VI and are characterized by means of their X-ray powder diagrams. The novel polymorphs are of low solubility and feature good fastness properties and violet colorations. The novel crystal polymorphs are suitable for pigmenting coating materials, plastics, printing inks, aqueous or solvent-based pigment preparations, electrophotographic toners and developers, powder coating materials, inks, preferably inkjet inks, and color filters, and for coloring seed.Type: GrantFiled: October 22, 2001Date of Patent: September 16, 2003Assignee: Clariant GmbHInventors: Martin U. Schmidt, Peter Kempter, Roland Born
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Patent number: 6617453Abstract: The triphendioxazine compounds of the general formula (I) in which the rings labeled 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: November 22, 2000Date of Patent: September 9, 2003Assignee: Clariant Finance (BVI) LimitedInventors: Bansi Lal Kaul, Patrick Boeglin, Peter Kempter
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Publication number: 20020123626Abstract: Process for phase conversion of a methyl-substituted, benzimidazolone-fused dioxazine pigment of composition C22H12Cl2N6O4 having the formula (1) 1Type: ApplicationFiled: October 22, 2001Publication date: September 5, 2002Inventors: Martin U. Schmidt, Peter Kempter, Roland Born
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Publication number: 20020091258Abstract: A mixed crystal of two or more different benzimidazolonedioxazine compounds of the formula (1) 1Type: ApplicationFiled: October 24, 2001Publication date: July 11, 2002Applicant: Clariant GmbHInventors: Martin U. Schmidt, Peter Kempter, Carsten Plueg, Roland Born
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Patent number: 6359131Abstract: The process provides a process for preparing dioxazines by ring closure of a compound of the formula (II) in which R1 is hydrogen or C1-C8 alkyl in the presence of a ring closure agent, which comprises using as reaction medium an aryl alkyl ether of the formula (III) or a mixture of aryl alkyl ethers of the formula (III) in which n is an integer from 0 to 2 and R2 is ethyl if n is 0 or is methyl if n is 1 or 2.Type: GrantFiled: March 24, 2000Date of Patent: March 19, 2002Assignee: Clariant GmbHInventors: Gert Nagl, Wolfgang Bauer, Peter Kempter
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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: 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: 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: 5565563Abstract: Triphendioxazine compounds of formula I, ##STR1## in which R.sub.1 and R.sub.2 are either both hydrogen or form a single chain linking the 8,9-; 9,10- or 10,11-positions, the single chain having the formula --NR.sub.5 ---(CO).sub.m --NH--, --CR.sub.5 .dbd.CH--CO--NH--, --CO--CH.sub.2 --CO--NH--, --CO--CH.dbd.CR.sub.5 --NH--, --CO--NH--CO--NH--, --CO--NH--CR.sub.6 .dbd.N--, --CR.sub.6 .dbd.N--CO--NH--, --NR.sub.5--(CO).sub.m --O--or --NH--CR.sub.5 .dbd.N--whereR.sub.5 is hydrogen, C.sub.1-4 alkyl or phenyl, R.sub.6 is hydrogen, C.sub.1-4 alkyl or phenyl;m is 1 or 2 and R.sub.3 and R.sub.4 are either both hydrogen or form a single chain linking the 1,2-, 2,3- or 3,4-positions, the single chain having a formula selected from --NR.sub.5 --(CO).sub.m --NH--, --CR.sub.5 .dbd.CH--CO--NH--, --O--CH.sub.2 --CO--NH--, --CO--CH.dbd.CR.sub.5 --NH--, --CO--NH--CO--NH--, --CONH--CR.sub.6 .dbd.N--, --CR.sub.6 .dbd.N--CO--NH--, --NR.sub.5 --(CO).sub.m --O--or --NH--CR.sub.5 .dbd.N--where the symbols R.sub.5, R.sub.Type: GrantFiled: December 2, 1994Date of Patent: October 15, 1996Assignee: Sandoz Ltd.Inventors: Bansi L. Kaul, Peter Kempter