Patents by Inventor Karl-Rudolf Gassen
Karl-Rudolf Gassen 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: 6716889Abstract: Reacting weakly basic anion exchangers bearing tertiary amino groups with ethylene oxide under pH control and addition of acid leads to superior strongly basic anion exchangers.Type: GrantFiled: April 2, 1998Date of Patent: April 6, 2004Assignee: Bayer AktiengesellschaftInventors: Holger Lütjens, Axel Ingendoh, Karl-Rudolf Gassen, Peter Wenzl, Klaus Rall
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Patent number: 6596864Abstract: This invention relates to compounds of the formula (I) where Z is SO3M, COOR1, CONR1, SO2NHR1, NHCOR1, COR2, or CN, where R1 is M or C1-C3-alkyl and R2 is C1-C3-alkyl or phenyl, X is O or NR3, where R3 is hydrogen or C1-C4-alkyl, Y is hydrogen or C1-C4-alkyl, M is hydrogen, an alkali metal cation, or an optionally substituted ammonium ion, n is from 4 to 35, and m is 0, 1 or 2.Type: GrantFiled: October 30, 2001Date of Patent: July 22, 2003Assignee: Bayer AktiengesellschaftInventors: Uwe Vogt, Rolf Brockmann, Thomas Roick, Karl-Rudolf Gassen, Ulrich Feldhues
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Patent number: 6576687Abstract: The invention relates to a novel process for the preparation of polycondensate solutions based on polyamidoamine/epichlorohydrin resins that gives products having a very low content of organic chlorine compounds, in particular a 1,3-dichlorophenol-2-propanol content of <0.1%, in combination with high activity and good shelf-life.Type: GrantFiled: July 2, 2001Date of Patent: June 10, 2003Assignee: Bayer AktiengesellschaftInventors: Karl-Rudolf Gassen, Joachim König, Karlheinrich Meisel, Fritz Puchner, Jürgen Reiners, Horst Zwick
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Patent number: 5840902Abstract: .beta.-Hydroxyalkylpicolinium salts of the formula (I) ##STR1## wherein A, R.sup.1 to R.sup.3 and X have the meanings given in the description, which are obtained by reaction of picolines of the formula (II) ##STR2## with alkylene oxides of the formula (III) in the presence of a 1- to 3-basic acid and in water or an organic solvent as the reaction medium and are used as intermediate products for the preparation of cationic dyestuffs, and dyestuff preparations comprising such cationic dyestuffs.Type: GrantFiled: November 20, 1996Date of Patent: November 24, 1998Assignee: Bayer AktiengesellschaftInventors: Karlheinrich Meisel, Klaus Walz, Gerd-Friedrich Renner, Hans Schulze, Carsten Gerdes, Karl-Rudolf Gassen, Reiner Ditzer, Lothar Klein
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Patent number: 5463088Abstract: A process for preparing perfluoroalkoxy(alkylthio)benzenes from perfluorochloroalkoxy(alkylthio)-benzenes by reaction with hydrogen fluoride in the gas phase and in the presence of a catalyst.Type: GrantFiled: April 26, 1994Date of Patent: October 31, 1995Assignee: Bayer AktiengesellschaftInventors: Norbert Lui, Albrecht Marhold, Karl-Rudolf Gassen
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Patent number: 5264632Abstract: 2,2-Difluorocyclopropyl derivatives of the formula ##STR1## in which R represents alkyl, optionally substituted aryl or optionally substituted aralkyl andX represents hydroxymethyl, 2-hydroxyethyl, isocyanato, amino, amino hydrohalide or a radical of the formula --CO--R.sup.1, whereR.sup.1 represents hydrogen, hydroxyl, alkoxy, alkyl, halogen or amino,are intermediates for fungicides.Type: GrantFiled: December 8, 1992Date of Patent: November 23, 1993Assignee: Bayer AktiengesellschaftInventors: Karl-Rudolf Gassen, Bernd Baasner
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Patent number: 5208388Abstract: 2,2-Difluorocyclopropyl derivatives of the formula ##STR1## in which R represents alkyl, optionally substituted aryl or optionally substituted aralkyl andX represents hydroxymethyl, 2-hydroxyethyl, isocyanato, amino, amino hydrohalide or a radical of the formula --CO--R.sup.1, whereR.sup.1 represents hydrogen, hydroxyl, alkoxy, alkyl, halogen or amino,are intermediates for fungicides.Type: GrantFiled: September 20, 1991Date of Patent: May 4, 1993Assignee: Bayer AktiengesellschaftInventors: Karl-Rudolf Gassen, Bernd Baasner
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Patent number: 5183932Abstract: Herbicidal substituted 4-amino-5-alkylthio-1,2,4-triazol-3-ones of the formula ##STR1## in which R.sup.1 represents in each case straight-chain or branched alkyl, alkenyl or alkinyl, each of which has up to 4 carbon atoms, andR.sup.2 represents sec-butyl, tert.-butyl or optionally substituted C.sub.5 -C.sub.10 -alkyl, alkenyl or alkinyl, or piperidyl- or morpholinyl-alkyl, optionally substituted C.sub.3, C.sub.4, C.sub.5 and C.sub.7 -cycloalkyl, substituted cyclohexyl, or optionally substituted benzyl, phenethyl, naphthylmethyl or naphthylethyl.Type: GrantFiled: February 12, 1991Date of Patent: February 2, 1993Assignee: Bayer AktiengesellschaftInventors: Klaus-Helmut Muller, Joachim Kluth, Klaus Konig, Karl-Rudolf Gassen, Kurt Findeisen, Markus Lindig, Klaus Lurssen, Hans-Joachim Santel, Robert R. Schmidt
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Patent number: 5171901Abstract: Hexafluoropropanes of the formula CF.sub.3 -CHX-CF.sub.3 where X is hydrogen or chlorine are prepared by reacting hexachloropropene with hydrogen fluoride in the gas phase in the presence of a catalyst.Type: GrantFiled: December 5, 1991Date of Patent: December 15, 1992Assignee: Bayer AktiengesellschaftInventors: Karl-Rudolf Gassen, Dietmar Bielefeldt, Albrecht Marhold, Hans-Helmut Schwarz
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Patent number: 5169427Abstract: Herbicidal cycloalkyl-substituted thiadiazolyloxyacetamides of the formula ##STR1## in which R.sup.1 represents hydrogen, or represents an optionally substituted radical selected from the group consisting of alkyl, alkenyl, alkynyl and aralkyl,R.sup.2 represents an optionally substituted radical selected from the group consisting of alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, aralkyl, aryl, alkoxy, alkenyloxy and alkynyloxy, orR.sup.1 and R.sup.2, together with the nitrogen atom to which they are bonded, form an optionally substituted saturated or unsaturated nitrogen-heterocyclic radical, which can contain further hetero atoms and to which a benzo grouping can be fused, andR.sup.3 represents optionally substituted cycloalkyl.Intermediates of the formula ##STR2## are also new.Type: GrantFiled: May 28, 1991Date of Patent: December 8, 1992Assignee: Bayer AktiengesellschaftInventors: Heinz Forster, Hans-Joachim Diehr, Bernd Baasner, Ernst Kysela, Albrecht Marhold, Karl-Rudolf Gassen, Robert R. Schmidt
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Patent number: 5159111Abstract: Novel intermediates for fungicides, comprising fluorocyclopropyl derivatives of the formula ##STR1## in which R represents alkyl, optionally substituted aryl or optionally substituted aralkyl,X represents hydrogen, chlorine or bromine andR.sup.1 represents hydroxyl, alkoxy, alkyl or halogen.Type: GrantFiled: September 13, 1991Date of Patent: October 27, 1992Assignee: Bayer AktiengesellschaftInventors: Karl-Rudolf Gassen, Bernd Baasner
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Patent number: 5124476Abstract: .alpha.-Fluoroacryloyl derivatives are prepared by reacting a dihalogenopropene with an anhydrous mixture of nitric acid and hydrofluoric acid to give a 1-nitro-2,2-fluorohalogeno-3-halogenopropane, converting this in the presence of a strong acid and a little water at elevated temperature to a 2,2-fluorohalogeno-3-halogenopropanoic acid, converting this into an ester or an amide and finally treating this with a dehalogenating agent.Type: GrantFiled: August 13, 1990Date of Patent: June 23, 1992Assignee: Bayer AktiengesellschaftInventors: Karl-Rudolf Gassen, Albrecht Marhold
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Patent number: 5095147Abstract: 2,2-Difluorocyclopropyl derivatives of the formula ##STR1## in which R represents alkyl, optionally substituted aryl or optionally substituted aralkyl andX represents hydroxymethyl, 2-hydroxyethyl, isocyanato, amino, amino hydrohalide or a radical of the formula --CO--R.sup.1, whereR.sup.1 represents hydrogen, hydroxyl, alkoxy, alkyl, halogen or amino,are intermediates for fungicides.Type: GrantFiled: April 26, 1991Date of Patent: March 10, 1992Assignee: Bayer AktiengesellschaftInventors: Karl-Rudolf Gassen, Bernd Baasner
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Patent number: 5087775Abstract: A process for the preparation of partially fluorinated alcohols starting from halogen-containing alkenes, and 2,2,3,3,4,4-hexafluorocyclopentanol as a new partially fluorinated alcohol.Type: GrantFiled: October 24, 1990Date of Patent: February 11, 1992Assignee: Bayer AktiengesellschaftInventors: Karl-Rudolf Gassen, Dietmar Bielefeldt, Michael Negele, Heinz Ziemann
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Patent number: 5081283Abstract: Novel intermediates for fungicides, comprising fluorocyclopropyl derivatives of the formula ##STR1## in which R represents alkyl, optionally substituted aryl or optionally substituted aralkyl,X represents hydrogen, chlorine or bromine andR.sup.1 represents hydroxyl, alkoxy, alkyl or halogen.Type: GrantFiled: April 26, 1991Date of Patent: January 14, 1992Assignee: Bayer AktiengesellschaftInventors: Karl-Rudolf Gassen, Bernd Baasner
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Patent number: 5075494Abstract: Process for the preparation of .alpha.-fluoroacrylic acid derivatives from 2,2-difluoro-1-methyl-cyclopropyl compounds and new 1,1-difluoro-2-halogenoethyl (halogeno)methyl ketones obtainable in this process as intermediates.Type: GrantFiled: April 25, 1990Date of Patent: December 24, 1991Assignee: Bayer AktiengesellschaftInventor: Karl-Rudolf Gassen
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Patent number: 5072030Abstract: Difluoropropionic acid and derivatives thereof are prepared by bringing elemental fluorine in the presence of a solvent into an addition reaction with appropriate acrylic acids or derivatives thereof. In this way, it is also possible to obtain novel fluorinated esters of 2,3-difluoropropionic acid.Type: GrantFiled: February 12, 1990Date of Patent: December 10, 1991Assignee: Bayer AktiengesellschaftInventors: Dietmar Bielefeldt, Karl-Rudolf Gassen, Walter Lange
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Patent number: 5047415Abstract: Novel 2,2-dihalogenocyclopropyl-hydroxy-ethyltriazoles of the formula ##STR1## in which Ar represents optionally substituted aryl,R represents alkyl, optionally substituted aryl or optionally substituted aralkyl,X.sup.1 represents halogen,X.sup.2 represents halogen and p0 Y represents the groups --OCH.sub.2 --, --SCH.sub.2 --, --CH.sub.2 CH.sub.2 -- or --CH.dbd.CH--, where the hetero atom is linked to the aryl radical when Y represents --OCH.sub.2 -- or --SCH.sub.2 --,and acid addition salts or metal salt complexes thereof, are fungicidally active.Type: GrantFiled: July 12, 1989Date of Patent: September 10, 1991Assignee: Bayer AktiengesellschaftInventors: Udo Kraatz, Graham Holmwood, Karl-Rudolf Gassen, Stefan Dutzmann, Wilhelm Brandes
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Patent number: 5021080Abstract: Herbicidal substituted 4-amino-5-alkylthio-1,2,4-triazol-3-ones of the formula ##STR1## in which R.sup.1 represents in each case straight-chain or branched alkyl, alkenyl or alkinyl, each of which has up to 4 carbon atoms, andR.sup.2 represents sec-butyl, tert.-butyl or optionally substituted C.sub.5 -C.sub.10 -alkyl, alkenyl or alkinyl, or piperidyl- or morpholinyl-alkyl, optionally substituted C.sub.3, C.sub.4, C.sub.5 and C.sub.7 -cycloalkyl, substituted cyclohexyl, or optionally substituted benzyl, phenethyl, naphthylmethyl or naphthylethyl.Type: GrantFiled: April 4, 1990Date of Patent: June 4, 1991Assignee: Bayer AktiengesellschaftInventors: Klaus-Helmut Muller, Joachim Kluth, Klaus Konig, Karl-Rudolf Gassen, Kurt Findeisen, Markus Lindig, Klaus Lurssen, Hans-Joachim Santel, Robert R. Schmidt
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Patent number: 4973583Abstract: Pesticidal O-halogenocyclobutyl S-alkyl (di) thiophosph(on)ates of the formula ##STR1## in which x represents oxygen or sulphur,p represents zero, one or two,m represents zero, one or two,n represents 2, 3 or 4R.sup.1 represents alkyl, alkoxy which is optionally interrupted by oxygen or sulphur and can be substituted by halogen, or alkenyloxy, alkinyloxy, heterocyclyl-alkoxy or cycloalkoxy which is optionally substituted by alkyl and/or halogen,R.sup.2 represents alkyl which is optionally interrupted by oxygen or sulphur and can be substituted by halogen, or alkenyl, alkinyl or heterocyclyl-alkyl andR.sup.3 represents hydrogen or alkyl.Type: GrantFiled: June 1, 1989Date of Patent: November 27, 1990Assignee: Bayer AktiengesellschaftInventors: Bernd-Wieland Kruger, Dietmar Bielefeldt, Karl-Rudolf Gassen, Bernhard Homeyer, Benedikt Becker, Hans-Detlef Matthaei, Wilhelm Stendel