Patents Assigned to Hoechst
  • Vaporizer for generating developer gas, containing ammonia gas, from aqueous ammonia for developing diazo copying material
    Patent number: 4172652
    Abstract: The invention relates to a vaporizer for generating developer gas, containing ammonia, from aqueous ammonia for developing diazo copying material, comprising a rectifying column with a transfer section, a substantially closed column head with a cover plate and a base plate, a first connecting branch for taking off the developer gas and a second connecting branch for feeding in aqueous ammonia opening into the column head, and a heated, steam-generating sump vessel at the foot of the transfer section, which includes a weir for liquids, which is located in the column head between the cover plate and the base plate below the connecting branches but above the transfer section, extends substantially over the entire cross-sectional area and has at least one passage orifice for liquid and at least one passage orifice for vapor.
    Type: Grant
    Filed: January 26, 1978
    Date of Patent: October 30, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Eckehard Stein
  • Cigarette filter
    Patent number: 4171705
    Abstract: This invention relates to a cigarette filter of cellulosic material composed at least partially of modified cellulose modified with at least one fatty acid group containing at least 14 carbon atoms in the molecule selected from the group consisting of a complex compound of a fatty acid containing basic chromium chloride and a melamine resin precondensate containing a fatty acid group.
    Type: Grant
    Filed: December 17, 1976
    Date of Patent: October 23, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Arno Holst, Michael Kostrzewa, Helmut Lask
  • Process of preparing a baked flour-containing product
    Patent number: 4172154
    Abstract: This invention relates to a baked foodstuff containing an additive to prevent softening caused by moisture, wherein the additive is a carbohydrate derivative which has been modified by means of heat energy, radiation or an additional chemical compound and which is water-insoluble to the extent of at least about 25% by weight, and is capable of swelling. The invention also relates to a process for the preparation of the baked foodstuff.
    Type: Grant
    Filed: October 28, 1977
    Date of Patent: October 23, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Gert-Wolfhard von Rymon Lipinski
  • Process for preparing pyrrolo-benzoic acid derivatives
    Patent number: 4172142
    Abstract: Salidiuretically-active 3-pyrrolo-5-sulfamoylbenzoic acids having a methylphenoxy or chlorophenoxy group substituted in the 4-position, and alkyl esters thereof, are disclosed, as are methods of making and using the same.
    Type: Grant
    Filed: December 21, 1977
    Date of Patent: October 23, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wulf Merkel, Dieter Bormann, Dieter Mania, Roman Muschaweck
  • Can lining bag of flexible plastic film
    Patent number: 4171764
    Abstract: Disclosed is a bag adapted for lining the inside of a container, comprising side walls and a closed end wall comprised of a flexible synthetic resinous sheet material and an open end wall opposite to the closed end wall, wherein the inside circumference of the bag defined by the side walls becomes increasingly larger from an intermediate point on the side walls in the direction of the open end wall, while the outside circumference preferably remains substantially constant.
    Type: Grant
    Filed: April 4, 1977
    Date of Patent: October 23, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerhard Schonbach, Klaus Heyse
  • Catalyst for reducing carbon monoxide
    Patent number: 4172053
    Abstract: Reduction of carbon monoxide by means of hydrogen with the resultant formation of a mixture of hydrocarbons having substantially from 1 to 4 carbon atoms in contact with a catalyst containing iron or a mixture of iron and copper as its catalytically active ingredient, the catalyst being made by contacting one or more complex salts of the following general formula:Me.sub.x [Fe(CN).sub.6 ].sub.yin which Me stands for an iron and/or copper-ion, x stands for a number of 1 to 4, and y stands for a number of 1 to 3, with hydrogen or a hydrogen/carbon monoxide-mixture at about 200.degree. to 500.degree. C., under 1 to 100 atmospheres absolute and over a period of about 2 to 20 hours and thereby reducing the complex salts substantially to elementary iron or copper.
    Type: Grant
    Filed: June 22, 1978
    Date of Patent: October 23, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wilhelm Vogt, Hermann Glaser, Jurgen Koch
  • Reactive lacquer composition based on unsaturated polyesters
    Patent number: 4172060
    Abstract: A reactive lacquer composition comprising hydroxyl containing polymers, a polyisocyanate, a solvent having no active hydrogen atoms, wherein the binder of the lacquer composition contains(A) 60 to 80 percent of a copolymer of(a) unsaturated polyesters having acid number of 10 to 20 and hydroxyl numbers of 100 to 250, which polyesters are prepared from saturated dicarboxylic acids or anhydrides thereof and diols having 2 to 15 carbon atoms, it being possible to replace up to 20 percent of the saturated dicarboxylic acids with saturated dimeric fatty acids which have 36 carbon atoms and contain two carboxyl groups, and(b) a mixture of monomers, consisting of (b.sub.1) styrene or methyl methacrylate, and (b.sub.2) at least one of hydroxylethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, and hydroxy-n-butyl acrylate, and(B) 20 to 40 percent of an organic polyisocyanate.
    Type: Grant
    Filed: May 25, 1977
    Date of Patent: October 23, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Horst Dalibor, Hans-Joachim Kiessling, Peter Quednau
  • Process for the preparation of 4-amino-1,8-naphthalimides
    Patent number: 4172202
    Abstract: N-substituted amides or optionally N-substituted hydrazides of 4-amino-naphthalic acids which may be substituted in 3-position by a sulfo group are obtained by reacting 4-halo-1,8-naphthalic anhydride with a primary amine or an optionally N-substituted hydrazine having a pK.sub.a -value of at least 8, exchanging in the so-obtained 4-halo-naphthalimide the halogen for the amino group by reacting it with ammonia and, optionally, subsequent sulfonation. The products are dyeing matters useful for the coloration of synthetic fibers, plastics, oils, waxes, resins, paper, printing pastes, lacquers or natural polyamides, especially for daylight-fluorescence pigments.
    Type: Grant
    Filed: January 9, 1978
    Date of Patent: October 23, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Theodor Papenfuhs
  • Process for continuously removing monomers from an aqueous dispersion of a polymer
    Patent number: 4171427
    Abstract: Monomeric matter is removed from an aqueous dispersion of a polymer containing at least 50 weight % of polymerized vinyl chloride. To this end, the dispersion is introduced into the upper portion of a column provided with sieve plates and contacted therein for 10 seconds up to 20 minutes, under 600 up to 1200 mm Hg, with hot steam at 100.degree. up to 150.degree. C. flowing countercurrently with respect to the dispersion. The polymer dispersion so treated is removed from the column base portion; and a vaporous matter mixture issuing at the head of the column is condensed stagewise so as to recover an aqueous phase and the monomeric matter.
    Type: Grant
    Filed: October 6, 1977
    Date of Patent: October 16, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Alexander Ohorodnik, Karl Kaiser, Rudolf Wesselmann
  • Two-component diazotype material
    Patent number: 4171222
    Abstract: This invention relates to an improvement in a two-component diazotype material comprising a film support and a light-sensitive layer thereon, the light-sensitive layer being composed of at least one polymeric hydrophobic binder, a light-sensitive diazonium salt and a coupler, the improvement that the light-sensitive layer additionally contains at least one resin containing acid groups, which resin has an acid number of at least about 100 and which is derived from the maleic acid or phthalic acid type.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: October 16, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Hans-Dieter Frommeld
  • Developing apparatus for developing latent electrostatic images
    Patent number: 4170195
    Abstract: This invention relates to an improvement in a developing apparatus for developing latent electrostatic images, comprising a hopper for a developer, two magnetic brush means rotatably supported one above the other between the side walls of the hopper, and strippers for removing the developer from the magnetic brush means, the improvement comprising a plurality of hinged compartment means in a collecting space for the developer in the hopper, and means for oscillating said compartment means in the longitudinal direction.
    Type: Grant
    Filed: December 22, 1977
    Date of Patent: October 9, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Klaus-Peter Schon
  • Process for making self-extinguishing laminates
    Patent number: 4170508
    Abstract: Self-extinguishing laminates are made by an improved process, wherein individual layers of a carrier material are impregnated with a thermosetting phenolic resin containing a flame-retardant agent and the impregnated layers are placed one above another and bonded together by compressing them at elevated temperature and under elevated pressure to give a hardened laminate. More specifically, finely pulverulent phosphorus pentanitride as a flame-retarding agent is dispersed in the plasticized or non-plasticized thermosetting phenolic resin, with or without a diluent; the phenolic resin, based on its solid matter content, and the phosphorus pentanitride being used in an approximate ratio by weight of 100:4 to 100:15; and the phenolic resin, based on its solid matter content, and the carrier being used in an approximate ratio by weight of 100:80 to 100:150.
    Type: Grant
    Filed: June 27, 1978
    Date of Patent: October 9, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Joachim Wortmann, Burkhard Schonrogge, Joseph Cremer, Franz-Josef Dany
  • Process for the preparation of ethylene glycol-dimethylether (dimethyl glycol)
    Patent number: 4169959
    Abstract: A process for the preparation of dimethyl glycol by the hydrogenolysis of methylglycol formal in the presence of catalysts which consist of oxide mixtures of silicon and aluminum and/or of rare earths, as well as of metallic nickel and/or cobalt and/or copper, wherein the catalysts contain additionally as promoter metallic palladium and/or rhodium and/or platinum.
    Type: Grant
    Filed: April 13, 1978
    Date of Patent: October 2, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Hans-Jurgen Arpe
  • Diamino-benzanilide disazo coloring agents
    Patent number: 4169830
    Abstract: Disazo compounds, obtained by diazotizing 4,4'-diaminobenzanilide and coupling it to one or more acetoacetyl benzimidazolones, are valuable pigments of good dispersibility, tinctorial strength, fastness to light, weathering, solvents and migration.
    Type: Grant
    Filed: November 10, 1977
    Date of Patent: October 2, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Klaus Hunger
  • Modified hydrocarbon resin composition for use in printing ink
    Patent number: 4169821
    Abstract: A composition for use as a binder in a non-aqueous printing ink which comprises a modified hydrocarbon resin containing carboxylic acid units, the carboxylic groups of which are partially esterified with a polyhydric alcohol in such an amount that the modified hydrocarbon resin product contains from 0.01 to 0.7 ester groups of polyhydric alcohol based on each acid group originally present and a process for its preparation.
    Type: Grant
    Filed: June 24, 1977
    Date of Patent: October 2, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerhard Werner, Hans-Jurgen Tietz, Reinhard Wagner, Wolfgang Dathe
  • Molding compositions based on oxymethylene polymers
    Patent number: 4169867
    Abstract: A thermoplastic molding composition being a suitable material for technical purposes comprises a mixture of an oxymethylene polymer and of an elastomeric copolyester having short-chain and long-chain diol elements as well. The molding composition is prepared by mixing and homogenizing the components and may contain usual additives, especially stabilizers.
    Type: Grant
    Filed: October 15, 1975
    Date of Patent: October 2, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Karlheinz Burg, Gunther Kirsch
  • Process for the preparation of N-(chloroaryl)-N',N'-dialkylamidines
    Patent number: 4169852
    Abstract: A process for the preparation of N-(chloroaryl)-N',N'-dialkylamidines in which N-aryl-N',N'-dialkylamidines in the form of their salts are directly chlorinated in halogenated hydrocarbons at 15.degree.-80.degree. C. From the hydrochloride salts thus obtained the free amidines are set free with alkaline agents. The N-(chloroaryl)-N',N'-dialkylamidines are valuable intermediates for the preparation of dyestuffs and insecticides.
    Type: Grant
    Filed: April 9, 1975
    Date of Patent: October 2, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Franz Landauer
  • Biaxially oriented polyester film with a flame-retardant finish and use thereof
    Patent number: 4169935
    Abstract: Disclosed is a biaxially oriented polyester film, wherein the polyester comprises a linear polyester comprising a dicarbocyclic acid and a diol, and further including from about 3 to 20 mole percent of the dicarboxylic acid of a phosphorus-containing chain member having structural units of the formula ##STR1## wherein R is a saturated, open-chain or cyclic alkylene radical, an arylene radical or an aralkylene radical, andR.sub.1 is an alkyl group containing up to 6 carbon atoms, an aryl or an aralkyl group.Also disclosed is the use of this film as an electrical insulator.
    Type: Grant
    Filed: June 7, 1978
    Date of Patent: October 2, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Klaus Hoheisel, Ulrich Bollert, Siegfried Janocha
  • Process for the manufacture of acetoacetyl-aminobenzenes
    Patent number: 4169851
    Abstract: The N-acetoacetylamino compounds of 2,5-dimethoxy-4-chloro-aniline, 2,4-dimethyl-aniline and 2-methyl-5-chloroaniline are obtained in a good yield and excellent purity, if the above-mentioned anilines are reacted with diketene in an inert organic solvent or diluent in the presence of from 0.1 to 6%, calculated on the weight of the aniline, of water, while adding catalytic amounts of acid. An industrial aniline quality is preferably dried by heating it with a solvent forming with water an azeotropic mixture, and thereafter the amount of water required is added. The products may be used without purification as coupling components for the preparation of pigments.
    Type: Grant
    Filed: November 2, 1978
    Date of Patent: October 2, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Rudiger Berthold, Wolfgang Tronich
  • Mixtures of optical brighteners
    Patent number: 4169810
    Abstract: A mixture of optical brighteners containing 0.05 to 0.95 part by weight of a compound from the benzoxazolyl- or benzothiazolylstilbene series and 0.95 to 0.05 part by weight of a compound of the bis-benzoxazolyl- or bis-benzothiazolylstilbene series or of the benzoxazolyl- or benzothiazolyl-stilbene oxazolo[5,4-6]pyridinyl or oxazolo[2,3-b]pyridinyl series. These mixtures show an enhanced degree of whiteness as compared to the same amount of the single components.
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: October 2, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Dieter Gunther, Rudiger Erckel, Gunter Rosch, Heinz Probst