Patents by Inventor Karl Siemensmeyer
Karl Siemensmeyer 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: 6294592Abstract: The invention provides for pigment preparations containing, as main components, A) at least a finely divided organic or inorganic pigment, B) a dispersing agent composed of formaldehyde-arylsulfonic acid or oxalkylated phenols condensates, C) a radiation curable binder, D) optionally a photoinitiator, and E) water. The invention also provides for the use of said preparations as inks for said ink jet printing method.Type: GrantFiled: December 30, 1999Date of Patent: September 25, 2001Assignee: BASF AktiengesellschaftInventors: Manfred Herrmann, Gert Motzkus, Wolfgang Reich, RĂ¼diger Sens, Bernd Siegel, Karl Siemensmeyer
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Patent number: 6136225Abstract: Polymerizable liquid-crystalline compounds of the formula IZ.sup.1 --Y.sup.1 --A.sup.1 --Y.sup.3 --M--Y.sup.4 --A.sup.2 --Y.sup.2 --Z.sup.2 IwhereZ.sup.1 and Z.sup.2 are radicals containing reactive groups via which polymerization can be effected,Y.sup.1 -Y.sup.4 are a single chemical bond, oxygen, sulfur, --O--CO--, --CO--O--, --O--CO--O--, --CO--NR--, --NR--CO--, --O--CO--NR--, --NR--CO--O-- or --NR--CO--NR--, where at least one of the groups Y.sup.3 and Y.sup.4 is --O--CO--O--, --O--CO--NR--, --NR--CO--O-- or --NR--CO--NR--,A.sup.1 and A.sup.2 are spacers having 2 to 30 carbon atoms in which the carbon chain may be interrupted by ether oxygen, thioether sulfur or by nonadjacent imino or C.sub.1 -C.sub.4 -alkylimino groups,M is a mesogenic group,R is C.sub.1 -C.sub.4 -alkyl,and compositions comprising them are distinguished by favorable liquid-crystalline phase-temperature ranges and can be used in optical display devices and in cholesteric liquid-crystalline colorants.Type: GrantFiled: March 2, 1998Date of Patent: October 24, 2000Assignee: BASF AktiengesellschaftInventors: Frank Meyer, Karl Siemensmeyer, Karl-Heinz Etzbach, Peter Schuhmacher
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Patent number: 6136251Abstract: A process for preparing pigment particles of defined size and shape comprises treating a sheetlike structure having through openings of defined shape and size with a polymerizable substance or mixture of substances in such a way that the openings are filled, removing any solvent present, polymerizing the substance or substance mixture, and isolating the resulting pigment particles from the openings. The pigments are readily varied in size and shape by variation of the substrate parameters and are useful for the known pigment applications, especially coatings, paints and inks.Type: GrantFiled: March 22, 1999Date of Patent: October 24, 2000Assignee: BASF AktiengesellschaftInventors: Karl-Heinz Etzbach, Harald Keller, Reinhold Leyrer, Tillmann Faust, Peter Schuhmacher, Karl Siemensmeyer
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Patent number: 6099750Abstract: Use of compounds in the plastic columnar discotic liquid-crystal phase for transport of electric charges.Type: GrantFiled: November 20, 1998Date of Patent: August 8, 2000Assignee: Siemens AktiengesellschaftInventors: Jurgen Simmerer, Karl-Heinz Etzbach, Karl Siemensmeyer, Wolfgang Paulus, Peter Schuhmacher, Birgit Glusen, Helmut Ringsdorf, Joachim H. Wendorff, Dietrich Haarer, Andreas Kettner
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Patent number: 6099751Abstract: Chiral compounds of the formula I ##STR1## where: R.sup.1,R.sup.2,R.sup.3,R.sup.4 are hydrogen or aromatic, aliphatic or araliphatic radicals having 1 to 40 carbon atoms,R.sup.5,R.sup.6,R.sup.7,R.sup.8 are aromatic or aliphatic radicals having 1 to 20 carbon atoms,with the proviso that at least one of the radicals R.sup.1 to R.sup.8 contains a polymerizable group,are used as dopes in liquid crystals, in compositions for coating substrates and in the preparation of interference pigments which can be used in printing inks and surface coatings.Type: GrantFiled: September 18, 1998Date of Patent: August 8, 2000Assignee: BASF AktiengesellschaftInventors: Frank Meyer, Karl Siemensmeyer, Hans-Georg Kuball, Bernhard Weiss, Dieter Seebach
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Patent number: 6036883Abstract: The use of low molecular-weight or polymeric organic compounds which are present in the columnar-helical phase and have liquid-crystalline properties, as photoconductors or in electronic components, corresponding photoconductive layers, an electrophotographic recording material and a method for enhancing the photoconductivity.Type: GrantFiled: May 21, 1998Date of Patent: March 14, 2000Assignee: BASF AktiengesellschaftInventors: Wolfgang Paulus, Lukas Haussling, Karl Siemensmeyer, Karl-Heinz Etzbach, Dieter Adam, Juergen Simmerer, Helmut Ringsdorf, Peter Schuhmacher, Dietrich Haarer, Sundeep Kumar
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Patent number: 5942030Abstract: Process for preparing pigments by applying a polymerizable mixture to a surface, orienting the liquid crystals present in the mixture, polymerizing the mixture, detaching the polymer film from the surface and comminuting the polymer film to form pigment particles, wherein the polymerizable mixture comprises:a.sub.1) at least one chiral liquid-crystalline polymerizable monomer ora.sub.2) at least one achiral liquid-crystalline polymerizable monomer and a chiral compound, and additionallyb) a polymeric binder and/or monomeric compounds which are converted by polymerization into a polymeric binder and/or a dispersion auxiliary.Type: GrantFiled: July 24, 1998Date of Patent: August 24, 1999Assignee: BASF AktiengesellschaftInventors: Peter Schuhmacher, Karl Siemensmeyer, Juan Antonio Gonzalez Gomez, Norbert Schneider
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Patent number: 5911911Abstract: Polymerized liquid-crystalline compositions are obtainable by radiation curing of mixtures comprising P0 a) one or more cellulose derivatives in which some or all of the hydroxyl groups of the cellulose are replaced by --OR, 13 O--CO--NH--R, --O--CO--R or --O--CO--OR, where each R can be identical or different and is an aliphatic or aromatic radical of up to 20 carbons,b) one or more polymerizable monomers andc) if desired, further additives.Type: GrantFiled: March 26, 1997Date of Patent: June 15, 1999Assignee: BASF AktiengesellschaftInventors: Harald Keller, Karl Siemensmeyer, Peter Schuhmacher, Manfred Muller, Rudolf Zentel, Georg Maxein
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Patent number: 5886242Abstract: The invention relates to chiral compounds containing at least one divalent or polyvalent chiral group, at least one polymerizable group, at least one spacer and at least one mesogenic group, and to their use as polymerizable, chiral dopes for the preparation of cholesteric networks.The novel compounds are suitable for use in electro-optical displays or as chiral dopes for nematic or cholesteric liquid crystals in order to produce layers which reflect in colors.Type: GrantFiled: January 12, 1998Date of Patent: March 23, 1999Assignee: BASF AktiengesellschaftInventors: Karl-Heinz Etzbach, Paul Delavier, Karl Siemensmeyer, Gerhard Wagenblast, Lothar Laupichler, Volkmar Vill
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Patent number: 5833880Abstract: Mixtures of liquid-crystalline compounds comprising at least two different substances of the formula I ##STR1## where Z.sup.1 and Z.sup.2, independently of one another, are polymerizable groups,Y.sup.1 and Y.sup.2, independently of one another, are each a direct bond, --O--, --COO--, --OCO-- or --S--,A.sup.1 and A.sup.2, independently of one another, are spacers, andR.sup.1, R.sup.2 and R.sup.3 are conventional substituents,and novel compounds of the above formula where at least two of Z.sup.1, Z.sup.2, Y.sup.1, Y.sup.2, A.sup.1 and A.sup.2 are not identical, are described. The novel mixtures and compounds are suitable, inter alia, as base material for color-effect materials and piezomaterials, preferably in chirally doped form.Type: GrantFiled: August 23, 1996Date of Patent: November 10, 1998Assignee: BASF AktiengesellschaftInventors: Karl Siemensmeyer, Karl-Heinz Etzbach, Paul Delavier, Frank Meyer
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Patent number: 5820783Abstract: Chiral compounds of the formula I ##STR1## where R.sup.1 is hydrogen or --Y--Z--Y.sup.1,R.sup.2 is ##STR2## and X is hydrogen, fluorine, chlorine, bromine, iodine, hydroxyl or OR.sup.1, whereY is a direct bond, CO or C.sub.2 - to C.sub.8 -alkylene in which nonadjacent carbon atoms may be replaced by O, CO, COO or OCO,Z is a group containing one or more saturated or unsaturated carbocyclic or heterocyclic rings,Y.sup.1 is C.sub.1 - to C.sub.15 -alkyl, C.sub.2 - to C.sub.15 -alkenyl, C.sub.1 - to C.sub.15 -alkoxy, C.sub.2 - to C.sub.15 -alkenyloxy, C.sub.1 - to C.sub.15 -alkanoyloxy or C.sub.3 - to C.sub.15 -alkenoyloxy, it being possible for nonadjacent carbon atoms in these radicals to be replaced by oxygen, OCO or COO, andn is 0, 1 or 2.Type: GrantFiled: July 29, 1997Date of Patent: October 13, 1998Assignee: BASF AktiengesellschaftInventors: Karl Siemensmeyer, Volkmar Vill, Hanns-Walter Tunger, Matthias Paul
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Patent number: 5804097Abstract: Liquid-crystalline compounds of the formula IX(--Y--A--Y--M--Y--B).sub.n I,whereX is an aromatic or aliphatic ring system,n is an integer from 2 to 6,each Y, independently of the others, is a direct bond, --COO--, --OCO--, --O--, --CONH-- or --CON(R)--, where R is C.sub.1 -- to C.sub.4 -alkyl,A is a spacer,M is a mesogenic group andB is a side chain,are particularly suitable for use in displays or for the production of light-reflecting coatings.Type: GrantFiled: August 22, 1996Date of Patent: September 8, 1998Assignee: BASF AktiengsellschaftInventors: Paul Delavier, Karl-Heinz Etzbach, Andreas Johann Schmidt, Karl Siemensmeyer, Gerhard Wagenblast
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Patent number: 5798147Abstract: A process for coating or printing substrates with a coating or printing composition comprises applying a polymerizable material containing liquid-crystalline, polymerizable monomers which carryat least two polymerizable groups for coating andat least one polymerizable group for printing,to the substrate, and subsequently carrying out the polymerization, where the coating composition or the printing composition comprisesa.sub.1) a chiral liquid-crystalline monomer andb) a polymeric binder and/or monomeric compounds which can be converted into the polymeric binder by polymerization, or, in the case of emulsion coatings and printing inks, a dispersion auxiliary d),or the coating composition or the printing composition comprisesa.sub.Type: GrantFiled: May 23, 1997Date of Patent: August 25, 1998Assignee: BASF AktiengesellschaftInventors: Erich Beck, Frank Meyer, Ulrich Poth, Karl Siemensmeyer, Claudia Sierakowski, Norbert Greif, Werner Ostertag, Michael Zirnstein, Reinhold Leyrer, Ekkehard Jahns, Karl-Heinz Etzbach, Peter Schuhmacher
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Patent number: 5798197Abstract: The use of low molecular-weight or polymeric organic compounds which are present in the columnar-helical phase and have liquid-crystalline properties, as photoconductors or in electronic components, corresponding photoconductive layers, an electrophotographic recording material and a method for enhancing the photoconductivity.Type: GrantFiled: February 20, 1997Date of Patent: August 25, 1998Assignee: BASF AktiengesellschaftInventors: Wolfgang Paulus, Lukas Haussling, Karl Siemensmeyer, Karl-Heinz Etzbach, Dieter Adam, Juergen Simmerer, Helmut Ringsdorf, Peter Schuhmacher, Dietrich Haarer, Sundeep Kumar
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Patent number: 5780629Abstract: The invention relates to chiral compounds containing at least one divalent or polyvalent chiral group, at least one polymerizable group, at least one spacer and at least one mesogenic group, and to their use as polymerizable, chiral dopes for the preparation of cholesteric networks. The novel compounds are suitable for use in electro-optical displays or as chiral dopes for nematic or cholesteric liquid crystals in order to produce layers which reflect in colors.Type: GrantFiled: June 6, 1996Date of Patent: July 14, 1998Assignee: BASF AktiengesellschaftInventors: Karl-Heinz Etzbach, Paul Delavier, Karl Siemensmeyer, Gerhard Wagenblast, Lothar Laupichler, Volkmar Vill
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Patent number: 5766679Abstract: Chiral nematic polyesters comprise as alcohol component chiral diol structural units and as acid component dicarboxylic acid residues comprising mesogenic groups. The polyesters are particularly suitable for surface coating.Type: GrantFiled: August 15, 1997Date of Patent: June 16, 1998Assignee: BASF AktiengesellschaftInventors: Karl Siemensmeyer, Frank Meyer, Karl-Heinz Etzbach, Hans R. Kricheldorf, Nicolas Probst
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Patent number: 5753141Abstract: The invention relates to chiral compounds of the general formulaA--Y--(M--Y).sub.n --B--(Y--M).sub.n --Y--AwhereB is a radical of the formula ##STR1## and where the radicals A independently of one another are C.sub.1 - to C.sub.20 -alkyl which may be substituted by fluorine, chlorine, bromine or cyano and may be interrupted by O, S, NH, NCH.sub.3, COO or OCO,X are carbon or boron,Y independently of one another are a chemical bond, O, S, NH, N(CH.sub.3), COO or OCO andM independently of one another are a mesogenic group andn independently of one another are 0 or 1 with the proviso that one n is other than 0.The compounds according to the invention are suitable as dopes in liquid-crystalline media.Type: GrantFiled: September 16, 1996Date of Patent: May 19, 1998Assignee: BASF AktiengesellschaftInventors: Karl Siemensmeyer, Volkmar Vill, Hanns-Walter Tunger
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Patent number: 5744057Abstract: A polymerizable, chiral compound of the formula (I):(Z--Y.sup.1 -A-O--CO--O-M-Y.sup.2).sub.n X (I)where:A, M, Y.sup.1 and Y.sup.2, X, n and Z are as defined herein; and which compound is suitable for use in electro-optical displays or as chiral dopes for nematic or cholesteric liquid crystals for the production of layers which reflect in colors.Type: GrantFiled: June 5, 1996Date of Patent: April 28, 1998Assignee: BASF AktiengesellshaftInventors: Frank Meyer, Karl Siemensmeyer, Karl-Heinz Etzbach, Peter Schuhmacher
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Patent number: 5736068Abstract: Novel triphenylene compounds which contain, bonded to the triphenylene framework, at least three ethylenically unsaturated groups or groups carrying oxiranyl or thiiranyl groups, and a process for the preparation of discotic liquid crystalline crosslinked polymers.Type: GrantFiled: May 22, 1996Date of Patent: April 7, 1998Assignee: BASF AktiengesellschaftInventors: Lukas Haeussling, Dirk Funhoff, Karl Siemensmeyer, Karl-Heinz Etzbach, Friedrich Closs, Helmut Ringsdorf, Peter Schuhmacher
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Patent number: 5709817Abstract: Described herein are chiral compounds of the formula I ##STR1## where R.sup.1 is hydrogen or --Y--Z--Y.sup.1,R.sup.2 is ##STR2## and X is hydrogen, fluorine, chlorine, bromine, iodine, hydroxyl or OR.sup.1, whereY is a direct bond, CO or C.sub.2 - to C.sub.8 -alkylene in which nonadjacent carbon atoms may be replaced by O, CO, COO or OCO,Z is a group containing one or more saturated or unsaturated carbocyclic or heterocyclic rings,Y.sup.1 is C.sub.1 - to C.sub.15 -alkyl, C.sub.2 - to C.sub.15 -alkenyl, C.sub.1 - to C.sub.15 -alkoxy, C.sub.2 - to C.sub.15 -alkenyloxy, C.sub.1 - to C.sub.15 -alkanoyloxy or C.sub.3 - to C.sub.15 -alkenoyloxy, it being possible for nonadjacent carbon atoms in these radicals to be replaced by oxygen, OCO or COO, andn is 0, 1 or 2.Type: GrantFiled: November 24, 1995Date of Patent: January 20, 1998Assignee: BASF AktiengesellschaftInventors: Karl Siemensmeyer, Volkmar Vill, Hanns-Walter Tunger, Matthias Paul