Patents by Inventor Meinhard Rolf

Meinhard Rolf 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).

  • Publication number: 20100092887
    Abstract: Use of quinacridones of the formula (I) in which A is an organic radical substituted by one or more fluorine atoms, B is H, F, Cl, Br or an optionally substituted organic radical which may optionally together with A form a ring in colour filters for LCDs.
    Type: Application
    Filed: May 19, 2009
    Publication date: April 15, 2010
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: ULRICH FELDHUES, FRANK LINKE, STEPHAN MICHAELIS, DIRK PFUETZENREUTER, HORST BERNETH, MEINHARD ROLF
  • Patent number: 5284511
    Abstract: The present invention relates to a process for preparing a beta-phase metal phthalocyanine pigments in which(a) a crude metal phthalocyanine having an average particle size of about 10 to about 200 .mu.M is dry milled until the average particle size is reduced to about 0.01 to about 0.5 .mu.m;(b) the milled metal phthalocyanine is finished by thoroughly mixing said metal phthalocyanine with at least about 4 parts by weight, relative to the metal phthalocyanine, of a finishing solvent containing a mixture of(i) about 5 to 100 percent by weight, based on the total amount of finishing solvent, of a monocarboxylic acid monoester, dicarboxylic acid diester, diol diester, lactone, or cyclic carbonate, or a mixture thereof, and(ii) 0 to about 95 percent by weight, based on the total amount of finishing solvent, of water;(c) the ester used in step (b) is hydrolyzed; and(d) the beta-phase metal phthalocyanine pigment is collected.
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: February 8, 1994
    Assignees: Miles Inc., Bayer Aktiengesellschaft
    Inventors: Meinhard Rolf, Abdul Sattar
  • Patent number: 5194626
    Abstract: Metal complexes of azines of the formula ##STR1## in which X denotes hydrogen or halogen,R denotes hydrogen or an organic radical,R.sub.1 denotes hydrogen or an organic radical,R.sub.2 denotes an organic radical, in which R.sub.1 and R.sub.2 together with the C atom linking them can also form a carbocyclic or heterocyclic ring or a carbocyclic or heterocyclic ring system in which the rings and ring systems mentioned can also be substituted, and one of the radicals R.sub.1, R.sub.2 or R.sub.1 and R.sub.2 together contain a group capable of forming a metal salt, and processes for pigmenting using these metal complexes.
    Type: Grant
    Filed: January 17, 1992
    Date of Patent: March 16, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Meinhard Rolf, Bernd Kaletta
  • Patent number: 5194393
    Abstract: The present invention relates to a sensor with a novel construction for a detection method of molecules labelled with fluorescent dye for detecting these dissolved substances or analytes by energy transfer with a simple fluorescence technique and increased sensitivity in the detection as well as versatile use for different tasks and the possibility of reproducible preparation of films bound to solid surfaces.
    Type: Grant
    Filed: November 8, 1990
    Date of Patent: March 16, 1993
    Assignee: Bayar Aktiengesellschaft
    Inventors: Herbert Hugl, Eberhard Kuckert, Dietmar Mobius, Holger Ohst, Meinhard Rolf, Hans J. Rosenkranz, Heinrich C. Schopper, Hans-Ulrich Siegmund, Klaus Sommer, Rolf Wehrmann
  • Patent number: 5162518
    Abstract: Porphyrins of the formula ##STR1## in which the substituents have the meaning given in the description are obtained by heating compounds of the formula ##STR2## if appropriate in the presence of compounds of the formula ##STR3## The porphyrins are used as pigments.
    Type: Grant
    Filed: January 17, 1992
    Date of Patent: November 10, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernd Kaletta, Meinhard Rolf, Walther Wolf, David R. Terrell
  • Patent number: 5128267
    Abstract: Naphthotriazolium salts which are chromogenic indicators for reducing substrate, such as NADH or NADPH.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: July 7, 1992
    Assignee: Miles Inc.
    Inventors: Jurgen Kocher, Meinhard Rolf, Klaus Wehling
  • Patent number: 5091532
    Abstract: A new process for the preparation of pigments of the formula ##STR1## comprises first reacting phthalodinitrile in an organic medium in the presence of a base with an alcohol and then with a compound of the formula ##STR2## in the presence of water at a pH of 1-6.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: February 25, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernd Kaletta, Meinhard Rolf
  • Patent number: 4721745
    Abstract: Pigments of the formula ##STR1## in which Me=Zn, Cu, Co or preferably Ni,R=alkyl, cycloalkyl, aralkyl, aryl and hetaryl, where the mentioned radicals can be substituted, andAr=optionally substituted aryl,processes for their preparation, and their use.
    Type: Grant
    Filed: October 15, 1986
    Date of Patent: January 26, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rutger Neeff, deceased, Meinhard Rolf, Walter Muller
  • Patent number: 4709019
    Abstract: Anthraquinone-azo pyridone-containing compounds which in one of their tautomeric structures, correspond to the formula ##STR1## in which A denotes an .alpha.-anthraquinone radical which is free from sulphonic acid groups and is unsubstituted or substituted and preferably consists of at most 5 fused rings;R.sub.1 denotes hydrogen; alkyl, preferably C.sub.1 -C.sub.4 -alkyl; aryl, preferably phenyl or naphthyl; carboxyl; carboxylic acid ester, preferably carboxylic acid C.sub.1 -C.sub.4 -alkyl ester; or hydroxyl andR.sub.2 denotes hydrogen; halogen; nitro; cyano; unsubstituted or substituted carbamoyl or sulphamoyl; alkylcarbonyl, in particular (C.sub.1 -C.sub.4 -alkyl)-carbonyl; alkoxycarbonyl, in particular (C.sub.1 -C.sub.4 -alkoxy)-carbonyl; alkyl- or unsubstituted or substituted aryl-sulphone, preferably C.sub.1 -C.sub.
    Type: Grant
    Filed: April 21, 1983
    Date of Patent: November 24, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Meinhard Rolf, Rutger Neeff, Walter Muller
  • Patent number: 4666526
    Abstract: Azine pigments having the probable structure ##STR1## wherein the rings designated by T, R', X and X' can be substituted or expanded to naphthalene systems. The pigments can be prepared by reacting compounds having the probable structures ##STR2## in the presence of hydrazine. The compounds having the probable structures (IV) and (IVa) are formed by reacting isatoic anhydrides or anthranilic acid esters or anthranilic acid amides with at least one mol of an aminoiminoisoindolenine.
    Type: Grant
    Filed: January 16, 1985
    Date of Patent: May 19, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Meinhard Rolf, Rutger Neeff
  • Patent number: 4628093
    Abstract: Red pigment of the formula ##STR1## a process for its preparation and its use.
    Type: Grant
    Filed: October 23, 1984
    Date of Patent: December 9, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rutger Neeff, Meinhard Rolf, Walter Muller
  • Patent number: 4614547
    Abstract: Pigments which, in one of their tautomeric forms, have the formula ##STR1## in which R signifies --CH.sub.3 or ##STR2## and which, in the event that R is --CH.sub.3, are present in the .beta.-modification which is characterized by the lattice plane spacings d/.ANG. 13.33, 12.67, 9.17 and 15.15 having the relative intensities 100, 100, 60 and 2%, process for their preparation and their use.
    Type: Grant
    Filed: August 19, 1985
    Date of Patent: September 30, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rutger Neeff, deceased, Meinhard Rolf, Walter Muller
  • Patent number: 4564680
    Abstract: Isoindolazines which, in one of their tautomeric structures, have the formula ##STR1## where the rings designated X and T can be substituted andA.sup.1 and A.sup.2 represent the divalent radical of a compound having two replaceable hydrogen atoms on a C or N atom, in particular the divalent radical of an active methylene compound, of an amine, of a hydrazine, of a hydrazide or of a hydrazone,salts and complexes of these compounds, processes for their preparation, and their use as pigments.
    Type: Grant
    Filed: August 3, 1983
    Date of Patent: January 14, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Meinhard Rolf, Rutger Neeff, Walter Muller, Volker Hederich
  • Patent number: 4435589
    Abstract: Process for the preparation of dimethyl succinylosuccinate, or the disodium salt thereof, by condensation of dimethyl succinate in a 35-45 percent by weight solution of sodium methylate in methanol, and a process for the preparation of dianilinodihydroterephthalic acids, the dimethyl esters and salts thereof, and of dianilinoterephthalic acids, and the dimethyl esters and salts thereof, starting from the disodium salt of dimethyl succinylosuccinate prepared according to the new process, without intermediate isolation.
    Type: Grant
    Filed: January 21, 1982
    Date of Patent: March 6, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Meinhard Rolf, Detlef-Ingo Schutze, Rutger Neeff, Hans-Volker Runzheimer
  • Patent number: 4389215
    Abstract: Anthraquinone-azomethine compounds of the formula ##STR1## or of the tautomeric formula ##STR2## or of the tautomeric formula ##STR3## in which A denotes an anthraquinone radical which is free from sulphonic acid groups and optionally further substituted and which preferably consists of at most 5 fused rings,R.sub.1 denotes hydrogen, C.sub.1 -C.sub.4 -alkyl, hydroxy-C.sub.1 -C.sub.4 -alkyl, optionally substituted phenyl, carboxyl, carboxylic acid, C.sub.1 -C.sub.4 -alkyl ester or hydroxyl,R.sub.2 denotes hydrogen, halogen, nitro, cyano, optionally substituted carbamoyl or optionally substituted sulphamoyl, sulphonic acid C.sub.1 -C.sub.4 -alkyl ester, sulphonic acid aryl ester, C.sub.1 -C.sub.4 -alkylcarbonyl, C.sub.1 -C.sub.4 -alkoxycarbonyl, optionally substituted benzoyl, alkyl or optionally substituted phenyl sulphone, or a hetero-aromatic radical, for example a radical of the formula ##STR4## or of the formula ##STR5## or of the formula ##STR6## R.sub.
    Type: Grant
    Filed: September 24, 1981
    Date of Patent: June 21, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rutger Neeff, Meinhard Rolf, Walter Muller
  • Patent number: 4323671
    Abstract: Anthraquinone derivatives which, in one of their tautomeric structures, correspond to the formula ##STR1## in which A denotes an anthraquinone radical which is free from sulphonic acid groups, is optionally further substituted and preferably consists of at most 5 fused rings,m denotes a number from 1 to 4, preferably 1 or 2,R denotes a substituent andn denotes 0, 1, 2, 3 or 4,processes for their preparation, their use for pigmenting organic macromolecular substances, and the material pigmented in this manner.
    Type: Grant
    Filed: April 14, 1980
    Date of Patent: April 6, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rutger Neeff, Meinhard Rolf, Walter Muller
  • Patent number: 4323670
    Abstract: Anthraquinone-azomethine compounds of the formula ##STR1## or of the tautomeric formula ##STR2## in which A denotes an anthraquinone radical which is free from sulphonic acid groups and is optionally further substituted and which preferably consists of at most 5 fused rings,R.sub.1 denotes hydrogen, optionally substituted aryl, preferably ##STR3## hetero-aryl, cycloalkyl or C.sub.1 -C.sub.12 -alkyl, it being possible for the alkyl chain to be interrupted by oxygen or sulphur and/or to be substituted by hydroxyl groups or N(R.sub.3).sub.2 groups, --N(R.sub.3).sub.2 or ##STR4## R.sub.2 denotes a substituent, R.sub.3 denotes hydrogen, C.sub.1 -C.sub.4 -alkyl, cycloalkyl oroptionally substituted aryl,m denotes 1, 2, 3 or 4 andn denotes 0, 1, 2, 3, 4 or 5, processes for their preparation and processes for pigmenting organic macromolecular substances using the new anthraquinone-azomethine compounds.
    Type: Grant
    Filed: July 21, 1980
    Date of Patent: April 6, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rutger Neeff, Meinhard Rolf, Walter Muller
  • Patent number: 4319025
    Abstract: Anthraquinone-azomethine compounds of the formula ##STR1## or of the tautomeric formula ##STR2## or of the tautomeric formula ##STR3## in which A denotes an anthraquinone radical which is free from sulphonic acid groups and optionally further substituted and which preferably consists of at most 5 fused rings,R.sub.1 denotes hydrogen, C.sub.1 -C.sub.4 -alkyl, hydroxy-C.sub.1 -C.sub.4 -alkyl, optionally substituted phenyl, carboxyl, carboxylic acid, C.sub.1 -C.sub.4 -alkyl ester or hydroxyl,R.sub.2 denotes hydrogen, halogen, nitro, cyano, optionally substituted carbamoyl or optionally substituted sulphamoyl, sulphonic acid C.sub.1 -C.sub.4 -alkyl ester, sulphonic acid aryl ester, C.sub.1 -C.sub.4 - alkylcarbonyl, C.sub.1 -C.sub.4 -alkoxycarbonyl, optionally substituted benzoyl, alkyl or optionally substituted phenyl sulphone, or a hetero-aromatic radical, for example a radical of the formula ##STR4## or of the formula ##STR5## or of the formula ##STR6## R.sub.
    Type: Grant
    Filed: July 21, 1980
    Date of Patent: March 9, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rutger Neeff, Meinhard Rolf, Walter Muller
  • Patent number: 4309221
    Abstract: Anthraquinone derivatives of the formula ##STR1## or of the tautomeric formula ##STR2## in which A denotes an anthraquinone radical which is free from sulphonic acid groups and is optionally further substituted and which preferably consists of at most 5 fused rings,m denotes an integer, preferably 1 or 2, andR.sub.1 denotes a hydroxyl group or a radical of the formula ##STR3## wherein R.sub.2 represents a substituent andn represents 0, 1, 2, 3 or 4,processes for their preparation, their use for pigmenting organic macromolecular substances and the material pigmented in this manner.
    Type: Grant
    Filed: May 17, 1979
    Date of Patent: January 5, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rutger Neeff, Meinhard Rolf, Walter Muller
  • Patent number: 4288362
    Abstract: Heterocyclic compounds of the formula ##STR1## wherein R.sub.1 denotes a substituent,R.sub.2 denotes an optionally substituted carbocyclic-aromatic or heterocyclic-aromatic radical andn denotes 0, 1, 2, 3 or 4, and azo colorants of the formula ##STR2## wherein D denotes the radical of an aromatic or hetero-aromatic amine which is free from sulphonic acid groups,p denotes an integer, preferably 1 or 2, andR.sub.1, R.sub.2 and n have the meaning mentioned in claim 1, processes for the preparation of the heterocyclic compounds and of the azo colorants, and the use of the azo colorants as pigments.
    Type: Grant
    Filed: May 29, 1979
    Date of Patent: September 8, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Meinhard Rolf, Rutger Neeff, Walter Muller