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).

  • Patent number: 6716889
    Abstract: 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: Grant
    Filed: April 2, 1998
    Date of Patent: April 6, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Holger Lütjens, Axel Ingendoh, Karl-Rudolf Gassen, Peter Wenzl, Klaus Rall
  • Patent number: 6596864
    Abstract: 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: Grant
    Filed: October 30, 2001
    Date of Patent: July 22, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Uwe Vogt, Rolf Brockmann, Thomas Roick, Karl-Rudolf Gassen, Ulrich Feldhues
  • Patent number: 6576687
    Abstract: 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: Grant
    Filed: July 2, 2001
    Date of Patent: June 10, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Rudolf Gassen, Joachim König, Karlheinrich Meisel, Fritz Puchner, Jürgen Reiners, Horst Zwick
  • Patent number: 5840902
    Abstract: .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: Grant
    Filed: November 20, 1996
    Date of Patent: November 24, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karlheinrich Meisel, Klaus Walz, Gerd-Friedrich Renner, Hans Schulze, Carsten Gerdes, Karl-Rudolf Gassen, Reiner Ditzer, Lothar Klein
  • Patent number: 5463088
    Abstract: 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: Grant
    Filed: April 26, 1994
    Date of Patent: October 31, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Norbert Lui, Albrecht Marhold, Karl-Rudolf Gassen
  • Patent number: 5264632
    Abstract: 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: Grant
    Filed: December 8, 1992
    Date of Patent: November 23, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Rudolf Gassen, Bernd Baasner
  • Patent number: 5208388
    Abstract: 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: Grant
    Filed: September 20, 1991
    Date of Patent: May 4, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Rudolf Gassen, Bernd Baasner
  • Patent number: 5183932
    Abstract: 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: Grant
    Filed: February 12, 1991
    Date of Patent: February 2, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus-Helmut Muller, Joachim Kluth, Klaus Konig, Karl-Rudolf Gassen, Kurt Findeisen, Markus Lindig, Klaus Lurssen, Hans-Joachim Santel, Robert R. Schmidt
  • Patent number: 5171901
    Abstract: 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: Grant
    Filed: December 5, 1991
    Date of Patent: December 15, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Rudolf Gassen, Dietmar Bielefeldt, Albrecht Marhold, Hans-Helmut Schwarz
  • Patent number: 5169427
    Abstract: 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: Grant
    Filed: May 28, 1991
    Date of Patent: December 8, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinz Forster, Hans-Joachim Diehr, Bernd Baasner, Ernst Kysela, Albrecht Marhold, Karl-Rudolf Gassen, Robert R. Schmidt
  • Patent number: 5159111
    Abstract: 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: Grant
    Filed: September 13, 1991
    Date of Patent: October 27, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Rudolf Gassen, Bernd Baasner
  • Patent number: 5124476
    Abstract: .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: Grant
    Filed: August 13, 1990
    Date of Patent: June 23, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Rudolf Gassen, Albrecht Marhold
  • Patent number: 5095147
    Abstract: 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: Grant
    Filed: April 26, 1991
    Date of Patent: March 10, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Rudolf Gassen, Bernd Baasner
  • Patent number: 5087775
    Abstract: 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: Grant
    Filed: October 24, 1990
    Date of Patent: February 11, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Rudolf Gassen, Dietmar Bielefeldt, Michael Negele, Heinz Ziemann
  • Patent number: 5081283
    Abstract: 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: Grant
    Filed: April 26, 1991
    Date of Patent: January 14, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Rudolf Gassen, Bernd Baasner
  • Patent number: 5075494
    Abstract: 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: Grant
    Filed: April 25, 1990
    Date of Patent: December 24, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventor: Karl-Rudolf Gassen
  • Patent number: 5072030
    Abstract: 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: Grant
    Filed: February 12, 1990
    Date of Patent: December 10, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dietmar Bielefeldt, Karl-Rudolf Gassen, Walter Lange
  • Patent number: 5047415
    Abstract: 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: Grant
    Filed: July 12, 1989
    Date of Patent: September 10, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Udo Kraatz, Graham Holmwood, Karl-Rudolf Gassen, Stefan Dutzmann, Wilhelm Brandes
  • Patent number: 5021080
    Abstract: 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: Grant
    Filed: April 4, 1990
    Date of Patent: June 4, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus-Helmut Muller, Joachim Kluth, Klaus Konig, Karl-Rudolf Gassen, Kurt Findeisen, Markus Lindig, Klaus Lurssen, Hans-Joachim Santel, Robert R. Schmidt
  • Patent number: 4973583
    Abstract: 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: Grant
    Filed: June 1, 1989
    Date of Patent: November 27, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernd-Wieland Kruger, Dietmar Bielefeldt, Karl-Rudolf Gassen, Bernhard Homeyer, Benedikt Becker, Hans-Detlef Matthaei, Wilhelm Stendel