Patents by Inventor Rainer Tresch
Rainer Tresch 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: 6933371Abstract: Disclosed are bisazo compounds of the formula Ia or Ib where R1 is hydrogen or methyl, the X groups are independently —CH2CH2— or —CH2CH2CH2—, R2, R3, and R4 are independently hydrogen or methyl, A is an anion and n corresponds to the valency of A. Also disclosed are the use of the bisazo compounds for dyeing, especially paper, and colorants containing said bisazo compounds.Type: GrantFiled: September 13, 2001Date of Patent: August 23, 2005Assignee: BASF AktiengesellschaftInventors: Gunter-Rudolf Schröder, Sophia Ebert, Karl-Heinz Etzbach, Rainer Tresch, Rüdiger Sens
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Patent number: 6903197Abstract: Azoxy dyes of the general formula I in the form of the free acid where n is 0 or 1, each R1 is selected from the group consisting of methoxy, hydroxyl and carboxyl, each R2 is selected from the group consisting of carboxyl, amino, C1-C4-alkylamino, allylamino, benzylamino and methoxycarbonylmethylamino, and the phenyl rings A may additionally be substituted by C1-C8-alkyl, unsubstituted or methyl- or halogen-substituted phenyl, hydroxyl, amino, nitro, halogen, carboxyl, N-benzylcarbamoyl, unsubstituted or nitro-, halogen-, C1-C4-alkoxy- or acetoxy-substituted phenylcarbamoyl and naphthylcarbamoyl or be benzofused, their copper complexes, a process for preparing the copper complex dyes, azoxy dyes of the formula I in their partially or completely deacylated form, their copper complexes, colorants comprising these azoxy dyes and/or their copper complexes and also their use for dyeing and printing natural or synthetic substrates.Type: GrantFiled: March 9, 2004Date of Patent: June 7, 2005Assignee: BASF AktiengesellschaftInventors: Rainer Tresch, Karl-Heinz Etzbach, Rüdiger Sens, Claudia Kräh
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Patent number: 6846956Abstract: Described is a triarylmethane dye of the formula I where R1 and R2 are independently methyl, ethyl or hydroxyethyl, Q is substituted or unsubstituited phenyl or naphthyl and A? is the equivalent of an anion. It does not detach carcinogenic Michler's ketone.Type: GrantFiled: August 14, 2001Date of Patent: January 25, 2005Assignee: BASF AktiengesellschaftInventors: Hellmut Kast, Thomas Gessner, Rainer Tresch
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Publication number: 20040204570Abstract: Azoxy dyes of the general formula I in the form of the free acid 1Type: ApplicationFiled: March 9, 2004Publication date: October 14, 2004Applicant: BASF AkiengesellschaftInventors: Rainer Tresch, Karl-Heinz Etzbach, Rudiger Sens, Claudia Krah
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Patent number: 6743901Abstract: A process for preparing liquid formulations of dyes of the general formula I where the variables are as defined in the specification by diazotizing an amine of the formula II and then coupling the diazonium salt onto a compound of the formula III and also optionally adding solubilizing additives, which comprises effecting said diazotizing at a pH set to an acidic value using pure methanesulfonic acid or at least 20 mol % mixtures of methanesulfonic acid in monobasic acids.Type: GrantFiled: April 10, 2003Date of Patent: June 1, 2004Assignee: BASF AktiengesellschaftInventors: Michael Schmitt, Roland Merger, Rainer Tresch
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Patent number: 6727351Abstract: Azoxy dyes of the general formula I in the form of the free acid where n is 0 or 1, each R1 is selected from the group consisting of methoxy, hydroxyl and carboxyl, each R2 is selected from the group consisting of carboxyl, amino, C1-C4-alkylamino, allylamino, benzylamino and methoxycarbonylmethylamino, and the phenyl rings A may additionally be substituted by C1-C8-alkyl, unsubstituted or methyl- or halogen-substituted phenyl, hydroxyl, amino, nitro, halogen, carboxyl, N-benzylcarbamoyl, unsubstituted or nitro-, halogen-, C1-C4-alkoxy- or acetoxy-substituted phenylcarbamoyl and naphthylcarbamoyl or be benzofused, their copper complexes, a process for preparing the copper complex dyes, azoxy dyes of the formula I in their partially or completely deacylated form, their copper complexes, colorants comprising these azoxy dyes and/or their copper complexes and also their use for dyeing and printing natural or synthetic substrates.Type: GrantFiled: September 13, 2001Date of Patent: April 27, 2004Assignee: BASF AktiengesellschaftInventors: Rainer Tresch, Karl-Heinz Etzbach, Rüdiger Sens, Claudia Kräh
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Publication number: 20040010866Abstract: Disclosed are bisazo compounds of the formula Ia or Ib 1Type: ApplicationFiled: March 12, 2003Publication date: January 22, 2004Inventors: Gunter-Rudolf Schrder, Sophia Ebert, Karl-Heinz Etzbach, Rainer Tresch, R?uuml;diger Sens
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Patent number: 6673206Abstract: Paper, board and cardboard are produced by a process in which a paper stock is drained in the presence of condensates of basic amino acids with sheet formation. In particular, homo- and cocondensates of lysine and the crosslinked condensates obtainable therefrom by reaction with crosslinking agents are used in amounts of from 0.01 to 5% by weight, based on dry paper stock, as a means of increasing the dry and wet strength and the absorptivity of paper, for fixing anionic dyes and interfering substances in the paper, for increasing the drainage rate and the retention as well as the efficiency of synthetic anionic and cationic retention aids in the production of paper, board and cardboard by draining a paper stock with sheet formation.Type: GrantFiled: February 28, 2002Date of Patent: January 6, 2004Assignee: BASF AktiengesellschaftInventors: Friedrich Linhart, Bernd Dirks, Rainer Tresch, Bernhard Mohr, Dietrich Fehringer
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Publication number: 20030181740Abstract: Described is a triarylmethane dye of the formula I where R1 and R2 are independently methyl, ethyl or hydroxyethyl, Q is substituted or unsubstituited phenyl or naphthyl and A⊖ is the equivalent of an anion. It does not detach carcinogenic Michler's ketone.Type: ApplicationFiled: February 14, 2003Publication date: September 25, 2003Inventors: Hellmut Kast, Thomas Gessner, Rainer Tresch
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Patent number: 6346609Abstract: Cationic azo dyes of the general formula I where R1, R2, R3, A1, A2, B1, B2, An⊖, n and K have the meaning given in the specification are prepared and used for the dyeing and printing of natural or synthetic substrates and mixtures thereof.Type: GrantFiled: May 4, 2001Date of Patent: February 12, 2002Assignee: BASF AktiengesellschaftInventors: Karl-Heinz Etzbach, Torsten Freund, Rainer Tresch
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Patent number: 6048968Abstract: Cationic azo dyes of the formula I ##STR1## where the variables are as defined in the specification, amines as their intermediates, processes for preparing them, their use for dyeing and printing natural or synthtic substrates, and their mixtures are described.Type: GrantFiled: May 5, 1999Date of Patent: April 11, 2000Assignee: BASF AktiengesellschaftInventors: Karl-Heinz Etzbach, Torsten Freund, Rainer Tresch
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Patent number: 6048969Abstract: Cationic sulfonic acid dyes of the formula I ##STR1## where the variables are as defined in the specification, are useful for the dyeing or printing of polymeric material.Type: GrantFiled: April 6, 1999Date of Patent: April 11, 2000Assignee: BASF AktiengesellschaftInventors: Gunter-Rudolf Schroder, Udo Mayer, Rainer Tresch
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Patent number: 5098521Abstract: Paper, board and cardboard are produced from paper stocks containing foreign substances by drainage in the presence of a polymer which contains, as typical polymerized constituents, units of the formulae ##STR1## where R.sup.1 and R.sup.2 are each H, C.sub.1 -C.sub.3 -alkyl, and which have K values of not less than 130, the polymers containing less than 10 mol % of units of the formula II.Type: GrantFiled: January 9, 1991Date of Patent: March 24, 1992Assignee: BASF AktiengesellschaftInventors: Enrique Freudenberg, Friedrich Linhart, Rainer Tresch, Heinrich Hartmann, Walter Denzinger, Michael Kroener, Norbert Sendhoff