Patents Assigned to Hoechst
  • Photosensitive composition
    Patent number: 4160671
    Abstract: This invention relates to a photosensitive composition comprising an ester or an amide of an o-naphthoquinone diazide sulfonic or carboxylic acid and, based on the amount of this compound, about 1 to 50 per cent by weight of an organic dye capable of salt formation and about 5 to 75 per cent by weight of a photosensitive halogen-containing compound which releases acid upon exposure to light and having one of the general formulae I or II ##STR1## in which R.sub.a is an aryl group or a heterocyclic group which may be substituted, R.sub.b is a trihaloalkyl group or a trihaloalkenyl group having from 1 to 3 carbon atoms, and n is 1, 2 or 3.
    Type: Grant
    Filed: September 9, 1977
    Date of Patent: July 10, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Paul Stahlhofen
  • Analgesic phosphinyl compounds and compositions
    Patent number: 4160828
    Abstract: A phosphinyl derivative of formula (I) ##STR1## wherein X is =CH-- or =N--,R.sup.1 is(a) phenyl radical,(b) a quinolyl radical,(c) one of the radicals (a) and (b) being substituted by at least one substituent selected from the group consisting of halogen, trifluoromethyl and 1 to 3 alkyl radicals having in total up to 4 carbon atoms,R.sup.2 is selected from the group consisting of a dialkyl-phosphinylalkyl radical and a dialkyl phosphinyl-hydroxyalkyl radical each of said radicals R.sup.2 having a total of from 3 to 7 carbon atomsAnd acid addition salts thereof, pharmaceutical preparations containing said derivatives.
    Type: Grant
    Filed: February 10, 1978
    Date of Patent: July 10, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Alfons Soder, Klaus Perrey
  • 4-Benzyloxy-3-(chlorocarbonyl)-phenylacetyl chloride
    Patent number: 4160781
    Abstract: A process, and intermediates for the preparation of 6,11-dihydro-11-oxodibenz[b,e]oxepin-2-acetic acid are described. The acid possesses antiinflammatory and analgesic activity.
    Type: Grant
    Filed: September 5, 1978
    Date of Patent: July 10, 1979
    Assignee: American Hoechst Corporation
    Inventors: Arthur R. McFadden, Richard C. Allen, Thomas B. K. Lee
  • Cyclohexene-(1)-dione-(3,6)-tetraalkyldiketals and process
    Patent number: 4160109
    Abstract: Cyclohexene-(1)-dione-(3,6)-tetraalkyldiketals of the formula ##STR1## wherein each R is a primary or secondary C.sub.1-4 alkyl radical are obtained by catalytic hydrogenation of p-benzoquinone tetramethyl-diketal with about 1 mol of H.sub.2 per mole of diketal, in a basic medium, at a temperature of from about -10.degree. to +150.degree. C. and optionally by reketalization with a primary or secondary C.sub.2-4 alcohol in a slightly acid medium with substantial exclusion of water, at a temperature of from about -10.degree. to +35.degree. C. Cyclohexene-(1)-dione-(3,6)-tetraalkyldiketals, optionally dissolved in an alcohol ROH give hydroquinone dialkyl ethers on acidification and heating to about 60.degree. to 120.degree. C., which ethers are valuable dyestuff intermediates.
    Type: Grant
    Filed: January 26, 1978
    Date of Patent: July 3, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Rudolf Pistorius
  • Process and device for the manufacture of a tube bend of a thermoplast
    Patent number: 4160006
    Abstract: Crinkle-free tube bends can be produced by introducing a flexible core into the straight tube length to be bent, bending the tube length around movable templates at the optimum thermoforming temperature and, while bending, laying an extensible insert between the tube length and the bending template.
    Type: Grant
    Filed: March 6, 1978
    Date of Patent: July 3, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Alfred Patzner, Josef Kruger
  • Process for the manufacture of resorcinol
    Patent number: 4160113
    Abstract: The present invention is related to a process for the manufacture of resorcinols by catalytic dehydrogenation of cyclohexane diones-(1,3) in the liquid phase by means of a dehydrogenating mixture consisting of a solvent and of a catalyst containing a noble metal from Group VIII of the Periodic Table.
    Type: Grant
    Filed: November 11, 1977
    Date of Patent: July 3, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Werner H. Muller, Knut Riedel, Hans Krekeler
  • Photopolymer having 2-pyridone side group
    Patent number: 4159202
    Abstract: This invention relates to a photo-cross-linkable polymer containing units each having a 2-pyridone side group. The invention also relates to a photosensitive copying material including the novel photo-cross-linkable polymer.
    Type: Grant
    Filed: May 26, 1977
    Date of Patent: June 26, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Harald Furrer, Hartmut Steppan, Gerhard Lohaus
  • Light sensitive film composition
    Patent number: 4157918
    Abstract: Light sensitive coating compositions containing a dyestuff, which compositions exhibit improved adhesion to transparent film substrates, are disclosed. For example, the adhesion between a polyester base film and a light sensitive coating composition containing a light sensitive diazo material, a resinous binder and a dyestuff is improved by additionally incorporating into the composition an effective amount of an adhesion promoter based on a copolyester obtained by the esterification and subsequent polymerization of a lower alkylene glycol with a mixture of terephthalic acid, isophthalic acid, and at least one acyclic dicarboxylic acid. These coating compositions may be readily removed from the base film by appropriate lithographic developer solutions without substantial residual staining of the film by the dyestuff present in the coating composition.
    Type: Grant
    Filed: September 26, 1977
    Date of Patent: June 12, 1979
    Assignee: American Hoechst Corporation
    Inventors: Stanley F. Wanat, Oliver A. Barton
  • Process for the uniform dyeing of textile material webs with the aid of a uniform application of liquor
    Patent number: 4157595
    Abstract: Process for the uniform application of treatment liquors to textile material webs with the aid of a measurement of the total moisture content applied, wherein, in the course of the material run, immediately behind a machine for applying the liquor to the continuously fed material, several measuring position are arranged transversely to the transport direction of the material and measurements of the total moisture are made by means of a contactless method, the measuring pulses determined in this manner are transmitted to the control elements of the preceding liquor application unit and there the amount of liquor pick-up from several separately controllable sections, which are distributed across the width of liquor application unit, is controlled in agreement with the measured values of the total mixture.
    Type: Grant
    Filed: December 8, 1977
    Date of Patent: June 12, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Ulrich von der Eltz, Siegfried Glander
  • Sweetener mixture
    Patent number: 4158068
    Abstract: A sweetener mixture having an improved saccharose-like taste consisting of acetosulfame and at least one sweetener selected from the group of the aspartyl peptide esters, the sulfamate sweeteners, the sulfimide sweeteners and the dihydrochalcone sweeteners.
    Type: Grant
    Filed: June 22, 1977
    Date of Patent: June 12, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gert-Wolfhard Von Rymon Lipinski, Erich Luck
  • Process for the manufacture of vinyl chloride polymer dispersions with a low monomer content
    Patent number: 4158092
    Abstract: Polymer dispersions are subject to a spray treatment to reduce the monomer content thereof. The dispersions are sprayed against the wall of the vessel by means of at least one spray nozzle.The residual monomer content of polymer dispersions is further reduced by spraying them in at least two series connected vessels, conducting the escaping gaseous constituents in one direction and the dispersion in opposite direction from one vessel to the next. The process is little liable to troubles and ensures a very effective monomer removal without thermal damage of the polymer.
    Type: Grant
    Filed: October 26, 1977
    Date of Patent: June 12, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Franz Botsch, Christoph Heinze, Horst Wolff
  • Electrophotographic liquid developer and process for the manufacture thereof
    Patent number: 4157974
    Abstract: This invention relates to a liquid developer for developing electrostatic images which comprises an electrically insulating carrier liquid having dispersed therein pigmented polymer particles composed of pigment particles encapsulated by polymeric material and having a particle size in the range of about 0.1 to 12 .mu.m. The invention also includes a process for the preparation of the liquid developer.
    Type: Grant
    Filed: February 15, 1978
    Date of Patent: June 12, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Alfred Brechlin, Heinz Herrmann
  • Process for the manufacture of octafluoropropane
    Patent number: 4158023
    Abstract: Octafluoropropane, C.sub.3 F.sub.8, is prepared by a two-step process. In the first step hexafluoropropene is reacted with hydrogen fluoride in the presence of a chromium oxyfluoride catalyst. The 2H-heptafluoropropane obtained is reacted with fluorine in the presence of a catalyst which contains a subgroup element of the Periodic System as a free metal or as a fluoride. Octafluoropropane is isolated from the resulting gas mixture. Hydrogen fluoride also obtained may be recycled to the first reaction step.
    Type: Grant
    Filed: March 21, 1978
    Date of Patent: June 12, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Sigmar P. von Halasz
  • Acylamino(alkyl)benzene derivatives and process for preparing them
    Patent number: 4158063
    Abstract: The invention relates to acylamino(alkyl)benzene derivatives of the general formula ##STR1## in which W represents a group which can be converted into a carboxyl group, or an aldehyde group or an oxymethyl group or their derivatives or also a low molecular weight alkyl group, preferably a methyl group,X represents an aromatic or hetero-aromatic ring system,Y represents a single chemical bond or a hydrocarbon bridge, andZ represents hydrogen or one or even several other substituents,To their preparation and to pharmaceutical compositions containing them. The compounds have blood sugar lowering activity and may be used in the therapy of diabetes mellitus.
    Type: Grant
    Filed: January 6, 1977
    Date of Patent: June 12, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Volker Hitzel, Rudi Weyer, Elmar Bosies
  • Water-insoluble disazomethine mixed metal-complex compounds, process for preparing them and their use as colorants
    Patent number: 4157265
    Abstract: New valuable, water-insoluble mixed diaminophenylenedisazomethine-naphthalene metal-complex compounds had been found consisting of two or more metal-complex disazomethine compounds of different constitution or different metal complexes which are prepared according to this invention by reacting one or several o-phenylene diamines with one or several hydroxy-naphthaldehydes at which process metallization is carried out by addition of one or several metal-yielding agents of one or several different metals before, during or after the condensation reaction of the amino and aldehyde compounds.
    Type: Grant
    Filed: January 30, 1978
    Date of Patent: June 5, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Theodor Papenfuhs, Heinrich Volk
  • Sealing material on the basis of polytetrafluoroethylene fibers
    Patent number: 4157328
    Abstract: The invention describes a sealing material from polytetrafluoroethylene fibers, whose staple length is in the range of from 1 to 20 mm. They are intimately mixed with graphite; oil and finely divided polytetrafluoroethylene being advantageously added. The portion of PTFE fibers is at least 50% by weight, the portion of graphite is from 10 to 30% by weight, and the portion of finely divided PTFE is from 5 to 15% by weight. As PTFE fibers there are also used those which have been obtained by machining sintered PTFE resin. The sealing material is formed into tablets or half-rings.The seals prepared are marked by their applicability at uncommonly high pressures.
    Type: Grant
    Filed: September 15, 1977
    Date of Patent: June 5, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerhard Beyer, Gerhard Wolfel
  • Process for regeneration of sulfuric acid
    Patent number: 4157381
    Abstract: The invention provides a process for the regeneration of dilute sulfuric acid containing organic impurities and possibly also inorganic salt in several steps. In the first step, the dilute acid is concentrated by indirect heat exchange with the vapors of the second step, and in the second step it is concentrated by direct heat exchange with a countercurrent mixture of steam and acid vapors coming from a third step. In this third step, the acid discharged from the second step is mixed in direct heat exchange with superheated steam. The regenerated sulfuric acid is separated from this mixture and the remaining steam/vapor mixture is forwarded to the second step. In the case where the dilute acid contains organic substances, an oxidant is added in at least one of these process steps.
    Type: Grant
    Filed: September 14, 1978
    Date of Patent: June 5, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Kurt Bodenbenner, Gerhard Muller, Heinrich Muller
  • Benzenesulfonyl ureas
    Patent number: 4157395
    Abstract: Benzenesulfonyl ureas of the formula ##STR1## in which R, R.sup.1, X, X.sup.1 and Y have the defined meanings, and the salts thereof, process for preparing these compounds, pharmaceutical preparations containing them and their use for lowering the blood sugar level.
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: June 5, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Volker Hitzel, Rudi Weyer, Werner Pfaff, Karl Geisen
  • Production of alkylphosphines
    Patent number: 4156697
    Abstract: Alkyl phosphines of the general formula:R.sub.n PH.sub.3-n (I)are made. To this end hydrogen phosphide, a primary or a secondary phosphine is reacted with an alkylamine of the general formula:R.sub.n NH.sub.3-n (II)in a molar ratio of 0.1 to 10 mols of the alkylamine of formula II per mol of hydrogen phosphide or primary or secondary phosphine. The reaction is effected at a 150.degree. to 400.degree. C., at atmospheric pressure or a superatmospheric pressure up to 1 atmosphere gauge, and in contact with a catalyst comprising active carbon, copper (II) chromite, or one or more metals of Group Ib or VIII of the Periodic System of the elements. The starting materials are passed through a reaction zone at a rate which permits a contact time between them and the catalyst of 0.1 to 400 seconds.
    Type: Grant
    Filed: August 9, 1977
    Date of Patent: May 29, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Klaus Hestermann, Hartfrid Vollmer, Gero Heymer, Ernst-Gunther Schlosser
  • Thiazolidine derivatives
    Patent number: 4156735
    Abstract: 4-(Sulfamoyl-phenyl)-4-hydroxy-2-imino-thiazolidine-derivatives having salidiuretic activity and a process for their manufacture.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: May 29, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Jochen Lang, Roman Muschaweck