Patents Assigned to Hoechst
  • Patent number: 5474579
    Abstract: The present invention relates to mixtures of monoazo dyes, characterised in that they comprise one or more dyes of the general formula I ##STR1## one or more dyes of the general formula II ##STR2## and one or more dyes of the general formula III ##STR3## in which R.sup.1 to R.sup.8 independently of one another, are methyl, ethyl or n-propyl and R.sup.1 and R.sup.2 may each also be i-propyl and Hal is chlorine or bromine, processes for their preparation and their use for the dyeing and printing of hydrophobic synthetic fibre materials and blends thereof with natural fibre materials.
    Type: Grant
    Filed: September 8, 1994
    Date of Patent: December 12, 1995
    Assignee: Hoechst Mitsubishi Kasei Co.
    Inventor: Ulrich Buhler
  • Patent number: 5474820
    Abstract: A multilayer polypropylene film is disclosed that has at least one base layer containing polypropylene and at least one outer layer containing a mixture of two mixture components I and II. Mixture component I is essentially a polypropylene homopolymer or a copolymer of ethylene and propylene or ethylene and butylene or propylene and butylene or ethylene and another .alpha.-olefin having 5 to 10 carbon atoms or propylene and another .alpha.-olefin having 5 to 10 carbon atoms or a terpolymer of ethylene and propylene and butylene or ethylene and propylene and another .alpha.-olefin having 5 to 10 carbon atoms or a mixture of two or more of said homopolymers, copolymers and terpolymers or a blend of two or more of said homopolymers, copolymers and terpolymers, if desired mixed with one or more of said homopolymers, copolymers and terpolymers. Mixture component II is essentially an HDPE or a blend of two blend components A and B. Blend component A is essentially an HDPE.
    Type: Grant
    Filed: March 30, 1993
    Date of Patent: December 12, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ursula Murschall, Angela Speith
  • Patent number: 5475094
    Abstract: Salmycins, a process for their preparation and their use as a pharmaceutical Compounds of formula I, ##STR1## wherein R denotes .dbd.NOH (a), .dbd.O (b); --OH and --H (c), --NH.sub.2 and --H (d) or .dbd.N--O--R'(e);R' denotes phenyl or a branched or unbranched alkyl with 1 to 10 carbon atoms,R" denotes H, alkyl, hydroxy-alkyl and amino-alkyl, as well as the chemical equivalents and physiologically acceptable salts thereof. The salmycins and their derivatives are used as a pharmaceutical.
    Type: Grant
    Filed: August 11, 1994
    Date of Patent: December 12, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Laszlo Vertesy, Werner Aretz, Hans-Wolfram Fehlhaber, Bimal N. Ganguli
  • Patent number: 5475004
    Abstract: Antagonists for angiotensin II receptors of the AT.sub.1 subtype can be employed for the prophylaxis and combating of coronary heart disease.Furthermore these compounds, such as, for example, azoles of the formula (I) ##STR1## can also be used for the therapy of cognitive and erectile dysfunction.
    Type: Grant
    Filed: June 29, 1993
    Date of Patent: December 12, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Holger Heitsch, Gabriele Wiemer, Adalbert Wagner, Heinz-Werner Kleemann
  • Patent number: 5475128
    Abstract: Process for the continuous preparation of dialkyl vinylphosphonates using catalysts at temperatures of from 150.degree. to 270.degree. C. by dissociation of dialkyl acetoxyethanephosphonates at a pressure of from 5 to 500 mbar in contact with a liquid, catalytically active medium while drawing off the dialkyl vinylphosphonates formed and other volatile reaction products as vapors, by conveying the liquid medium in forced circulation via an evaporator while feeding in fresh dialkyl acetoxyethanephosphonate, if desired admixed with catalyst, corresponding to the distillation of dialkyl vinylphosphonates and other volatile compounds, and drawing off non-volatile material formed as byproduct from the liquid circuit to maintain constant conditions.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: December 12, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gunter Roscher, Wolf-Dietmar Kaufmann, Bernd Laugwitz
  • Patent number: 5475119
    Abstract: Ionic monomeric diallylammonium compounds having a targeted combination of diallylammonium cations with selected anions have particularly high and constant charge control properties and very good heat stabilities and dispersibilities.The compounds according to the invention are outstandingly suitable for use as colorless charge control agents in toners and developers for electrophotographic recording processes and for use as charge-improving agents in powders and paints for surface coating, in particular in triboelectrically or electrokinetically sprayed powder paints.
    Type: Grant
    Filed: December 17, 1992
    Date of Patent: December 12, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Rudiger Baur, Hans-Tobias Macholdt
  • Patent number: 5475176
    Abstract: The present invention relates to a process for preparing vinyl-substituted aromatic compounds of the formula (I) Ar--CH.dbd.CH.sub.2, where Ar is a phenyl group that may bear 1 to 5 substituents, naphthyl or anthryl or a naphthyl radical bearing 1 to 7 substituents or an anthryl radical bearing 1 to 8 substituents, or a mononuclear five-, six- or seven-membered heterocyclic aromatic group which contains an oxygen atom and/or one or two nitrogen atoms in the ring and may bear 1 to 5 substituents, wherein an arylamine of the formula (II) Ar--NH.sub.2, where Ar has the aforementioned meaning, is reacted in an organic acid with an organic nitrite of the formula (III) R--ONO, where R is an alkyl group having 1 to 18 carbon atoms, a phenyl radical which may bear 1 to 3 alkyl groups each having 1 to 4 carbon atoms, or is an alkylcarbonyl group having 2 to 5 carbon atoms, and ethylene in an organic solvent in the presence of a palladium(0) of palladium(II) compound at temperatures of 0.degree. to 35.degree. C.
    Type: Grant
    Filed: April 4, 1994
    Date of Patent: December 12, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Matthias Beller, Heinz Strutz
  • Patent number: 5472975
    Abstract: There are disclosed various compounds of the formula below, ##STR1## where n, X and R.sub.1 through R.sub.4 are as defined in the specification, which are useful for alleviating various memory dysfunctions characterized by a cholinergic deficit such as Alzheimer's disease.Compounds of this invention also inhibit monoamine oxidase and/or act at central .alpha..sub.2 -adrenergic receptors, and hence are useful as antidepressants.
    Type: Grant
    Filed: January 4, 1994
    Date of Patent: December 5, 1995
    Assignee: Hoechst-Roussel Pharmaceuticals Incorporated
    Inventors: Helen H. Ong, Gerard J. O'Malley, Michael C. Merriman, Mark G. Palermo
  • Patent number: 5473095
    Abstract: The present invention relates to a process for the preparation of compounds of the formula ##STR1## in which R.sup.1 is --CN, --COOH, --COOR', R' being an organic radical having 1 to 6 carbon atoms, --CONH.sub.2, --COCl or --CHO and R.sup.2 is H or Cl, which comprises reacting a compound of the formula ##STR2## in which R.sup.1 is as defined above and R.sup.3 is H or Cl, with a chlorinating agent in the presence of a chlorination catalyst at -10.degree. to 200.degree. C.
    Type: Grant
    Filed: January 27, 1994
    Date of Patent: December 5, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ralf Pfirmann, Theodor Papenfuhs, Georg Weichselbaumer
  • Patent number: 5472761
    Abstract: Vibration damping composites suitable for use in construction panels or constrained-layer elements are described. The composites include a viscoelastic gel prepared from 99.5-92.5 wt. % water and 0.5-7.5 wt. % of a superabsorbent polymer. Preferably, the polymer is of the carboxylic acid type and optionally includes starch or cellulose.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: December 5, 1995
    Assignee: Hoechst Celanese Corp.
    Inventors: Harris A. Goldberg, Joseph M. Pickton, Joseph J. DiBiase, William T. Ryans
  • Patent number: 5473008
    Abstract: The invention relates to a casting composition comprising a ceramic powder, an organic solvent, binder, plasticizer and a dispersant, which composition is suitable for producing green ceramic sheets by the tape casting process. The dispersant present in the casting composition of the invention is a polyvinyl alcohol/fatty acid ester having a degree of conversion in the range from 50 to 100%. The invention also relates to the use of such a casting composition for producing ceramic green sheets and a process for producing ceramic substrates using a green sheet thus produced.
    Type: Grant
    Filed: May 18, 1994
    Date of Patent: December 5, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Friedrich Hessel, Katharina Seitz, Andreas Roosen, Gerhard Wegner, Wolfgang Meyer, Wolfgang Sigmund
  • Patent number: 5472763
    Abstract: There is described a recyclable carpet floor covering comprising a backing, a tied-in pile yarn and a back finish with or without a secondary backing adhered to the (primary) backing, wherein the pile yarn, the (primary) backing and a secondary backing comprise polyester fibers and the back finish for the (primary) backing and for adhering a secondary backing comprises a consolidating and adhering composition comprising a combination of 10-70% by weight of a water-soluble or -dispersible first polyester A, and 90-30% by weight of a water-insoluble second polyester B, There are further described a process for producing the recyclable carpet floor covering and also an aqueous preparation of the consolidating and adhering composition comprising the polyesters A and B and the use thereof for consolidating the carpet floor coverings and optionally adhering them to secondary backings.
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: December 5, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerhard Schwarz, Manfred Weber
  • Patent number: 5473049
    Abstract: A process is described for obtaining proinsulin possessing correctly linked cystine bridges from a corresponding proinsulin amino acid chain in the presence of mercaptan and chaotropic auxiliary agents and at a pH of 10 to 11, as well as its direct isolation from the reaction mixture using hydrophobic adsorber resins.
    Type: Grant
    Filed: December 1, 1993
    Date of Patent: December 5, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Rainer Obermeier, Martin Gerl, Jurgen Ludwig, Walter Sabel
  • Patent number: 5472873
    Abstract: A Rhodotorula rubra strain has been found which reduces pentoxifylline to 100% to give the S-alcohol. Moreover, other oxoalkylxanthine derivatives can also be converted into the corresponding S-alcohol. The microbiologically obtained S-(+)-enantiomers can then be converted stereo-selectively into the respective R-(-)-enantiomers. The corresponding S-alcohols and the R-alcohols obtained by enantioselective inversion of configuration cause an increase in cerebral blood flow.
    Type: Grant
    Filed: February 10, 1994
    Date of Patent: December 5, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Werner Aretz, Harald Furrer, Ulrich Gebert, Heinz-Joachim Hinze
  • Patent number: 5472641
    Abstract: A paint remover composition consisting essentially of a single phase mixture of water, trioxane and an organic co-solvent having a flash paint above about 80.degree. C. is disclosed and claimed. Particularly preferred co-solvents are gamma-butyrolactone and N-methyl pyrrolidone.
    Type: Grant
    Filed: June 9, 1994
    Date of Patent: December 5, 1995
    Assignee: Hoechst Celanese Corp.
    Inventors: James E. Kuder, Larry F. Charbonneau, Elizabeth E. Fernekess
  • Patent number: 5470603
    Abstract: Method of coating cores of pharmaceutical tablets with a dry powder, wherein the cores are fed onto a conveyor, the dry powder is supplied to a region through which the cores are to be conveyed, and the cores are conveyed on the conveyor through the region with the cores maintained at a different electric potential from the dry powder. In this way, the dry powder is attracted to the exposed surfaces of the cores to form powder coatings thereon. The dry powder on the surface of the cores is then melted to convert the powder into fused film coatings secured to the cores.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: November 28, 1995
    Assignee: Hoechst UK Limited
    Inventors: John N. Staniforth, Martin P. Grosvenor
  • Patent number: 5470988
    Abstract: Process for the preparation of purified phthalimidoalkanecarboxylic acidsThe present invention relates to a process for the preparation of purified phthalimidoalkanecarboxylic acids which are contaminated with phthalic acid, lactam and/or water, including the following measures:a) fusing the contaminated phthalimidoalkanecarboxylic acid,b) holding the melt for a period and at a temperature sufficient for the impurities to have substantially departed from the melt andc) cooling the purified product melt.
    Type: Grant
    Filed: January 13, 1994
    Date of Patent: November 28, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Frank Jaekel
  • Patent number: 5470888
    Abstract: Polystyrene melts treated with flameproofing agents and nucleating agents are foamed by addition of alkanes, such as propane, butane or propane/butane mixtures, as blowing agents, such that the flame retardant properties of the polystyrene foams are achieved after a very short storage time, or at the latest after storage for three weeks at room temperature. Even after a storage time of one week, sufficient blowing agent is still present in the closed-cell pores of the polystyrene foams to be able to undertake adequate post-expansion of the foams with a foaming factor of 1.8 to 2.0.
    Type: Grant
    Filed: May 17, 1994
    Date of Patent: November 28, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hub A. G. Vonken, Jan op den Buysch
  • Patent number: 5470843
    Abstract: Carbohydrate-containing polymers which can have an HLB* of from about 10 to about 20 are disclosed. The compounds comprise a hydrophilic polymer portion, a carbohydrate portion comprising from 1 to about 20 naturally occurring, identical or different, monosaccharide units, at least one bifunctional spacer coupling the carbohydrate portion to the hydrophilic polymer portion, and a potentiator moiety. The potentiator moiety can be is a crosslinking moiety located within the hydrophilic polymer or a hydrophobic, hydrophilic or ionic moiety. Processes for the preparation and use of such polymers are also disclosed.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: November 28, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wilhelm Stahl, Michael Ahlers, Axel Walch, Eckhart Bartnik, Gerhard Kretzschmar, Susanne Grabley, Rudolf Schleyerbach
  • Patent number: 5470383
    Abstract: The invention relates to thickener combinations for building products of nonionic cellulose ethers soluble in water or aqueous surfactant solutions and selected surfactants or naphthalenesulfonic acid condensation products.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: November 28, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Walter Schermann, Dennis Miller, Eckhard Hilgenfeldt, Jozef Bohme-Kovac