Patents Assigned to Hoechst
  • Patent number: 4863971
    Abstract: A process for synthesis gas conversion utilizing perovskite catalysts is disclosed herein. The perovskites utilized in the process have a carbon selectivity of about eight mol percent or more for oxygenated compounds containing one to six carbon atoms. The process comprises reacting synthesis gas in the presence of a perovskite catalyst in the temperature range of about 200.degree. C. to about 400.degree. C.
    Type: Grant
    Filed: March 20, 1987
    Date of Patent: September 5, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: Jerry A. Broussard, Leslie E. Wade
  • Patent number: 4864065
    Abstract: The invention relates to a process for extracting halogenated hydroxyaromatics from aqueous solutions. In this process, the extractant used is an amine salt comprising an aliphatic amine having a total carbon number of 10 to 75 and a strong acid. The amine salt may be employed in undiluted form or diluted with an organic solvent.
    Type: Grant
    Filed: June 1, 1988
    Date of Patent: September 5, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Bernhard Wojtech, Siegbert Rittner, Heinz Reiss, Reinhard Zunder
  • Patent number: 4862546
    Abstract: Process and apparatus are provided for the batchwise wet treatment of textile material with an aqueous liquor that contains dyestuff or other textile processing products according to an exhaust technique. Textile material in continuous loop form is recirculated in a jet dyeing machine, and a recirculating gas stream propels the material. A blower recirculates the gas stream while aqueous liquor is metered into the stream by aspirating the liquor at the upstream side of the blower. The action of the blower finely disperses the liquor within the gas stream.
    Type: Grant
    Filed: July 20, 1988
    Date of Patent: September 5, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Ulrich von der Eltz, Wilhelm Christ
  • Patent number: 4863767
    Abstract: An improved method of bonding a polymeric composition comprised of a thermotropic liquid crystalline polymer to a substrate is provided. It has been determined that the adhesion of a thermotropic liquid crystalline polymer to a substrate is enhanced if the absolute difference between the surface pH of the substrate to which the polymer is to be bonded and the pH of the polymer itself is at least approximately 1.0 pH unit as measured by the method described herein.
    Type: Grant
    Filed: April 13, 1984
    Date of Patent: September 5, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: Sunil K. Garg, Samuel Kenig
  • Patent number: 4863032
    Abstract: A packaging wrapper for disk-shaped magnetic information carriers is disclosed. The wrapper is formed by folding over a blank to form a flat wrapper. The wrapper has projecting tabs jutting out laterally from the sides of the front wrapper wall and overlap zones on the rear wrapper wall formed as a result of folding-over of the projecting tabs. The projecting tabs are firmly bonded to the rear wrapper wall by means of welding. The blank for forming the packaging wrapper is formed from a biaxially oriented, opaque multi-ply film comprising a base layer consisting essentially of polypropylene and fillers. The fillers are present in a quantity in the range from 10 to 30% by weight, relative to the total weight of the polypropylene and fillers.
    Type: Grant
    Filed: March 11, 1988
    Date of Patent: September 5, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Lothar Bothe, Gunter Schloegl, Guenther Crass
  • Patent number: 4863799
    Abstract: Ceramic fibers are prepared from improved preceramic fibers having a core comprising an organosilicon preceramic polymer and at least one co-spun sheath layer comprising a synthetic film-forming polymer.
    Type: Grant
    Filed: May 22, 1986
    Date of Patent: September 5, 1989
    Assignee: Hoechst Celanese Corp.
    Inventors: Robert M. Mininni, Richard M. Arons
  • Patent number: 4862545
    Abstract: After a dyeing operation has been concluded, the hot dyeing liquor present in the piece dyeing jet is returned via a cooling heat exchanger in the dyeing circulation system back into the makeup storage vessel for the dyeing liquor. Thereafter, the liquor-free dyeing system, which is still under an elevated static pressure, is relieved to atmospheric whereby the dyeing system is cooled down adiabatically together with the dyed textile material present therein to such an extent that a sample can be taken therefrom rapidly and safely.
    Type: Grant
    Filed: July 20, 1988
    Date of Patent: September 5, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Ulrich von der Eltz, Wilhelm Christ
  • Patent number: 4863236
    Abstract: Optical waveguides of plastic usually consist of a core and a jacket, the core material having a higher refractive index than the jacket material. A suitable core material is a fluorine-free polymer and a suitable jacket material is a fluorine-containing polymer, which can also contain deuterium. The optical waveguides can be produced by passing a polymer rod through a solution of the jacket polymer and then removing the solvent. The optical waveguides are particularly suitable for the transmission of data with the aid of light waves with a wavelength of 500 to 750 nm.
    Type: Grant
    Filed: March 4, 1987
    Date of Patent: September 5, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Herbrechtsmeier, Manfred Fleissner, Werner Groh, Rudolf Heumuller, Gerhard Wieners
  • Patent number: 4864027
    Abstract: The compounds of the formula (I) ##STR1## in which X denotes CH.sub.2, O, S or NR.sup.6,R.sup.1 denotes alkyl, cycloalkyl, alkenyl, (substituted) phenyl, or (substituted) naphthyl,R.sup.2 and R.sup.3 denote alkyl, alkenyl or phenyl, or R.sup.2 and R.sup.3 together denote an alkylene chain,R.sup.4 denotes --H, --CN, --CCl.sub.3, --C.tbd.CH, alkyl, F, or --C(S)--NH.sub.2,R.sup.5 denotes pyridyl, furyl, thienyl, phthalimidyl, di(C.sub.1 -C.sub.4)alkylmaleinimidyl, thiophthalimidyl, dihydrophthalimidyl or tetrahydrophthalimidyl, which may all be substituted, or substituted phenyl, orR.sup.4 and R.sup.5 --together with the carbon atom bridging them--denote an optionally substituted indanyl, cyclopentenoyl or cyclopentenyl radical,with the proviso that compounds of the formula I in whichR.sup.1 denotes phenyl which is substituted in the para-position by (C.sub.1 -C.sub.4)alkoxy, halogen or (C.sub.1 -C.sub.4)alkyl;R.sup.2 and R.sup.3 denote CH.sub.3 ;X denotes O;R.sup.4 denotes H andR.sup.
    Type: Grant
    Filed: June 22, 1988
    Date of Patent: September 5, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans H. Shubert, Gerhard Salbeck, Walter Luders, Werner Knauf
  • Patent number: 4863827
    Abstract: A process for forming a multi-level positive working photosensitive element. One forms a composition containing an alkali soluble resin, an o-quinonediazide compound and an in-situ generated acid catalyzed crosslinker in a solvent mixture. After coating on a substrate, drying and partially cross-linking the first layer, a second positive working light sensitive layer is applied. Each light sensitive layer is activated by u.v. radiation in different parts of the spectrum. The top layer is imagewise exposed and developed to form a mask. The second layer is flood exposed through this mask and developed. Each development is conducted with an aqueous alkaline solution.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: September 5, 1989
    Assignee: American Hoechst Corporation
    Inventors: Sangya Jain, Yuh-Loo Chang
  • Patent number: 4861344
    Abstract: Water-soluble azo compounds having useful fiber-reactive dye properties conforming to the general formula ##STR1## in which: A is phenylene which may be substituted or unsubstituted, or is a radical of the formula ##STR2## in which W is a direct bond or a radical of the formula --CH.dbd.CH-- or --NH--CO--NH-- and R* denotes hydrogen, nitro, sulfo, carboxy, methyl, ethyl, methoxy or ethoxy;n is the number zero or 1;B is a radical of the formula ##STR3## where R is equal to carboxy or carbamoyl; M is hydrogen or an alkali metal; andK is one of five radicals described in the specification, each of which contains a fiber-reactive group.These azo compounds produce fast dyeings on carboxamido- and/or hydroxy-containing materials, in particular cellulose fibers. On cellulose, fast dyeings are also obtained in a weakly acid to neutral medium, for example together with disperse dyes for dyeing a polyester fiber portion.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: August 29, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ludwig Schlafer, Hartmut Springer, Reinhard Hahnle
  • Patent number: 4861535
    Abstract: A textile sheet structure which is irreversibly highly deformable is prepared by weaving or knitting a yarn which has a degree of elasticity under a load of 5 cN/tex of less than 50% and which consists at least in part of partially oriented, undrawn synthetic filaments which have birefringence values above 20.times.10.sup.-3, elongations at break between 70 and 200% and flow stresses of at least 6 cN/tex, which have been produced by high-speed spinning and are then subjected to a heat treatment under stress at temperatures between 100.degree. and 180.degree. C.
    Type: Grant
    Filed: June 12, 1986
    Date of Patent: August 29, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Jorgen Due, Bjarne Graves, Henning Bak
  • Patent number: 4861755
    Abstract: The invention relates to new peptides of the formula ##STR1## in which X, A, B, C, N', E, F, G and Z have the meanings indicated in the description, to a process for their preparation, to agents containing them, and to their use.
    Type: Grant
    Filed: January 14, 1987
    Date of Patent: August 29, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerhard Breipohl, Jochen Knolle, Wolfgang Konig, Bernward Scholkens
  • Patent number: 4861889
    Abstract: 3-(2,3,4,5,6-pentafluorophenoxy)-8-azabicyclo[3.2.1]octanes and methods for treating depression, convulsions, pain, and hypertension utilizing compounds or compositions thereof are disclosed.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: August 29, 1989
    Assignee: Hoechst-Roussel Pharmaceuticals, Inc.
    Inventors: Grover C. Helsley, Larry Davis, Gordon E. Olsen
  • Patent number: 4861775
    Abstract: Streptomyces spec. DSM 3813 produces novel compounds with a basic phenoxazinone structure, which have an antifungal and antiviral action and can be used as lipoxygenase inhibitors.
    Type: Grant
    Filed: August 25, 1987
    Date of Patent: August 29, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Axel Zeeck, Sabine Breiding-Mack, Susanne Grabley, Hartmut Voelskow, Gerhard Seibert
  • Patent number: 4861758
    Abstract: Coccidiocidal compositions which contain the polyether antibiotic maduramicin or its salt in combination with one or more active substances from the group comprising meticlorpindol methyl benzoquate, amprolium, beclotiamine or halofuginone or its salts show synergistic effects.
    Type: Grant
    Filed: November 9, 1987
    Date of Patent: August 29, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Wolfgang Raether
  • Patent number: 4861129
    Abstract: This invention provides an optical medium which consists of an inorganic glass monolith with a microporous structure containing an organic component which exhibits nonlinear optical response.In one embodiment this invention provides a sol-gel process for producing a composite of a transparent homogeneous microporous inorganic oxide glass monolith and an organic compound which exhibits nonliner optical response.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: August 29, 1989
    Assignee: Hoechst Celanese Corp.
    Inventors: Tessie M. Che, Dagobert E. Stuetz, Alan Buckley, Donald R. Ulrich
  • Patent number: 4861796
    Abstract: 2-Acetylaminogentisic acid has been isolated from the culture broth after cultivation of a bacterium of the genus Streptomyces. This compound has antibacterial actions against Gram-positive and Gram-negative bacteria.
    Type: Grant
    Filed: December 19, 1988
    Date of Patent: August 29, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Axel Zeeck, Sabine Breiding-Mack, Susanne Grabley, Hartmut Voelskow, Gerhard Seibert
  • Patent number: 4861537
    Abstract: Sintered polybenzimidazole articles are obtained by compacting a particulate, dried polybenzimidazole resin under a pressure of 2,000 to 10,000 psi in a mold, heating the formed article to a temperature in the range of 825.degree. to 950.degree. F. for at least four hours, cooling the polybenzimidazole article to below 800.degree. F. while maintaining the article under a pressure of 2,000 to 10,000 psi, and thereafter heating the constrained formed polybenzimidazole article to a temperature in the range of 825.degree. to 950.degree. F. for at least one hour.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: August 29, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: Bennett C. Ward, Edwardo Alvarez, Ralph S. Blake
  • Patent number: 4859350
    Abstract: A spin finish composition is disclosed which contains an associative thickener which does not significantly affect the initial viscosity of the spin finish composition but which causes a substantial increase in viscosity as water contained therein decreases from its initial level to about 70%, and which effects no substantial change in viscosity of the composition as the water contained therein decreases from 40 to 0%. By virtue of this behavior, a spin finish composition results which can be improved in terms of spreadability on the yarns, package build, spin line coherence, the number of broken filaments and the tackiness of the snow formed on the texturings disks. Additionally, variations in the evnironment in which spin finish is applied e.g., temperature and humidity, do not substsantially affect its performance.
    Type: Grant
    Filed: September 13, 1988
    Date of Patent: August 22, 1989
    Assignee: Hoechst Celanese Corp.
    Inventors: Gunilla E. Gillberg-LaFore, Helen A. Kravas