Patents Assigned to Hoechst
  • Patent number: 4880822
    Abstract: There are disclosed compounds of the formula ##STR1## where m, n, p, R, R.sub.1, R.sub.2 and R.sub.3 are as defined in the specification which compounds are useful for enhancing memory and also as analgesic and antidepressant agents.
    Type: Grant
    Filed: April 4, 1988
    Date of Patent: November 14, 1989
    Assignee: Hoechst-Roussel Pharmaceuticals, Inc.
    Inventors: Richard C. Effland, Joseph T. Klein
  • Patent number: 4880695
    Abstract: A two-step, sequential coating method is disclosed which permits the use of aqueous precursor solutions to coat water-insoluble compounds onto thermoplastic film. In a preferred embodiment, an aqueous oleic acid/ammonium oleate solution is coated onto amorphous polyester sheet which is subsequently monoaxially oriented by stretching in the machine direction, and coated with an aqueous solution of calcium hydroxide, thereby forming a layer of calcium oleate in situ. The coated film is subsequently biaxially oriented by stretching in the transverse direction, and heat-set.
    Type: Grant
    Filed: November 3, 1987
    Date of Patent: November 14, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: David Rudd, R. Scott Caines
  • Patent number: 4880818
    Abstract: There are disclosed compounds of the formula ##STR1## where X,Y are each independently hydrogen, loweralkyl, loweralkoxy, hydroxy, halogen, trifluoromethyl or nitro; R.sub.1 is hydrogen or loweralkyl; R.sub.2 ' is hydrogen or loweralkyl and R.sub.4 is hydrogen, loweralkyl or aryl, which are useful as hypotensive agents and as intermediates.
    Type: Grant
    Filed: July 12, 1988
    Date of Patent: November 14, 1989
    Assignee: Hoechst-Roussel Pharmaceuticals, Inc.
    Inventors: Karl Schonafinger, Helen Hu Ong
  • Patent number: 4880699
    Abstract: Disclosed herein are free-standing, pinhole-free, ultrathin polyimide films having thicknesses of about 400 angstroms or less and a process to prepare them. The films find particular utility in separatory applications.
    Type: Grant
    Filed: April 17, 1989
    Date of Patent: November 14, 1989
    Assignee: Hoechst Celanese Corporation
    Inventor: Rachel S. Kohn
  • Patent number: 4880870
    Abstract: A polymer granulate whose particles consist of a core component and a coating component can be prepared by mixing a granular polymer with a pulverulent coating agent. The core component is made of a water-soluble polymer, in particular a polyvinyl alcohol. The coating component is a water-soluble or water-insoluble substance which is applied to the water-moistened particles of the core component. The particles of the polymer granulate have diameters within the range from 0.6 to 6 mm. The granulate has particularly good freeflowing properties; it is especially suitable for preparing adhesives.
    Type: Grant
    Filed: July 30, 1985
    Date of Patent: November 14, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wolfgang Zimmermann, Albrecht Harreus
  • Patent number: 4880860
    Abstract: The invention relates to polyester molding compositions, comprising substantially the polyester, preferably polyethylene terephthalate, a nucleating agent, a special imide compound as a further crystallization accelerator and, if appropriate, the conventional reinforcing agents and additives. The special crystallization accelerator according to the invention is virtually unreactive with the polyester and, in particular, is considerably more resistant to migration than relevant crystallization accelerators according to the state of the art. The invention also relates to a process for the preparation of these polyester molding compositions.
    Type: Grant
    Filed: August 25, 1988
    Date of Patent: November 14, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Erich Blocker
  • Patent number: 4879123
    Abstract: A tube, in particular sausage casing, is composed of mutually connected sections which at the connection point, prior to connection, possess cut edges extending approximately at right angles to the longitudinal axis of the tube and parallel to each other. The sections are connected by an adhesive tape extending around the outside of the tube. When the tube, possessing two folded edges extending parallel to each other, is flattened, the part of the cut edges of one section extending from a first folded edge of the other opposite folded edge is situated within the tube and the other part of this cut edge, which extends from the second folded edge back to the first folded edge, is situated on the outside of the tube. Parts of the cut edge of the other section are situated in reversed arrangement, firstly on the outside of the tube and then within the tube.
    Type: Grant
    Filed: April 21, 1988
    Date of Patent: November 7, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Manfred Siebrecht
  • Patent number: 4879382
    Abstract: Pyrido[3,4-f]pyrrolo[1,2-b][1,2]triazepines and methods for treating depression, alleviating pain and inflammation, and enhancing memory utilizing compounds or compositions thereof are disclosed.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: November 7, 1989
    Assignee: Hoechst-Roussel Pharmaceuticals, Inc.
    Inventors: Richard C. Effland, Larry Davis, Kevin J. Kapples, Gordon E. Olsen
  • Patent number: 4879403
    Abstract: Compounds of the formula I ##STR1## in which the carboxyl group on carbon atom 3 is orientated in the endo-position relative to the bicyclic ring system of cis-configuration, and in which R.sup.1 denotes hydrogen, allyl, vinyl or a side-chain of a naturally occurring .alpha.-aminoacid, which may be protected, R.sup.2 denotes hydrogen, alkyl, alkenyl or aralkyl, Y denotes hydrogen or hydroxyl and Z denotes hydrogen, or Y and Z together denote oxygen, and X denotes alkyl, alkenyl or cycloalkyl, or aryl which is optionally mono-, di- or tri-substituted by alkyl, alkoxy, hydroxyl, halogen, nitro, amino, alkylamino, dialkylamino or methylenedioxy, or denotes indol-3-yl, a process for their preparation, agents containing these compounds and their use.
    Type: Grant
    Filed: November 2, 1988
    Date of Patent: November 7, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Volker Teetz, Rolf Geiger, Hansjorg Urbach, Reinhard Becker, Bernward Scholkens
  • Patent number: 4879418
    Abstract: A process for the preparation of aldehydes including reacting olefins with carbon monoxide and hydrogen in an aqueous liquid phase in the presence of a rhodium catalyst and a specific class of water soluble aryl phosphines. These phosphines are preferably mixtures of alkali metal salts and quaternary ammonium salts of sulfonated aryl phosphines.
    Type: Grant
    Filed: August 1, 1988
    Date of Patent: November 7, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hanswilhelm Bach, Helmut Bahrmann, Boy Cornils, Wilhelm Gick, Volker Heim, Werner Konkol, Ernst Wiebus
  • Patent number: 4877298
    Abstract: This invention provides a thin film waveguide electrooptic intensity modulation device. The thin film waveguide is an isotropic organic medium which exhibits nonlinear optical response. The device is adapted to modulate waveguided radiation by refractive index change commensurate with change in an applied electric field.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: October 31, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: Chia-Chi Teng, Dagobert E. Stuetz
  • Patent number: 4878224
    Abstract: In one embodiment this invention provides a tunable laser device which is characterized by a dye laser medium which consists of a porous glass matrix containing an incorporated solution of a lasing dye, and which is adapted to operate continuously in combination with an optical pumping means.
    Type: Grant
    Filed: September 16, 1988
    Date of Patent: October 31, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: James E. Kuder, James L. McGinnis, Harris A. Goldberg, Timothy R. Hart, Tessie M. Che
  • Patent number: 4877843
    Abstract: Copolymers of p-acetoxystyrene and allyl esters of ethylenically unsaturated acids are selectively hydrolyzed to copolymers of p-vinylphenol and allyl esters of ethylenically unsaturated acids using acid or base catalysis in an alcohol or water.
    Type: Grant
    Filed: September 11, 1987
    Date of Patent: October 31, 1989
    Assignee: Hoechst Celanese Corporation
    Inventor: Balaram Gupta
  • Patent number: 4877878
    Abstract: Compounds of the formula I ##STR1## and the acid-addition salts thereof, where A=CH or N; Ar=naphthyl, thienyl or phenyl; Z=oxygen or sulfur; R.sup.1 =alkyl, F or Cl; g=0-2; L=0 or 1; m=0-4; p=0 or 1; X=O, S or N-R.sup.3 ; R.sup.2 =alkyl, alkoxy, halogen, SCH.sub.3, COC.sub.6 H.sub.5, CF.sub.3, COOCH.sub.3, COOC.sub.2 H.sub.5, or NO.sub.2 ; n=0-2; R.sup.2, under certain circumstances, is alternatively --CH.dbd.CH--CH.dbd.CH-- or phenoxy are described. Processes for the preparation thereof are also described. ##STR2## are valuable intermediates for the preparation of I. The compounds I serve as antimycotics.
    Type: Grant
    Filed: December 29, 1988
    Date of Patent: October 31, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Klaus-Dieter Kampe, Wolfgang Raether, Walter Dittmar
  • Patent number: 4878212
    Abstract: Provided is an archival recording medium and a method for recording information on same. The recording medium comprises a microporous polymeric layer and an energy-absorbing material, e.g., a layer of an energy-absorbing material such as a metal or dye/polymer layer deposited on the microporous layer. If desired, further dimensional stability and mechanical strength can be provided by a thermally stable substrate or by tensioning the medium within a rigid frame. Information is recorded by the energy-absorbing material heating up in localized irradiated regions and causing the controlled collapse of the microporous structure in the microporous polymer layer. The collapsed portions of the structure constitute the information which can then be read either by reflectance or transmission.
    Type: Grant
    Filed: February 22, 1988
    Date of Patent: October 31, 1989
    Assignee: Hoechst Celanese Corporation
    Inventor: James E. Kuder
  • Patent number: 4877849
    Abstract: This invention discloses a process for the preparation of substituted polybenzimidazole polymers by reacting an unsubstituted polybenzimidazole polymer with a pyrocarbonate to produce an oxyformulated polybenzimidazole polymer. The oxyformulated polybenzimidazole polymer can be heated to convert it to an N-substituted polybenzimidazole polymer. Membranes, fibers and other products produced from the products of these reactions are highly resistant to chemical reactions with broad utility as fibers or membranes.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: October 31, 1989
    Assignee: Hoechst Celanese Corporation
    Inventor: Joseph J. Rafalko
  • Patent number: 4877133
    Abstract: An end wall comprises a central wall body and outer wall parts which surround and enclose the central wall part. The central wall body is of circular design and has a central insertion peg which is provided with V-shaped ridges on its peripheral surface. The outer wall parts have an inward-curving quadrant-shaped abutment surface which has the same radius as the central wall body. On the rear side of the composite plate, junctions are provided along the abutment surfaces of the outer wall parts and of the central wall body, into which junctions connecting pieces are driven. The junctions and the connecting pieces in each case have the outline of double swallowtail.At its front side, each outer wall part is provided with a locking boss which continues a rounded corner surface and has the same radius as this corner surface. The side walls of the plates are either of smooth design or provided with stacking bosses and stacking pockets.
    Type: Grant
    Filed: March 8, 1989
    Date of Patent: October 31, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Otto Klenter, Klaus Burk
  • Patent number: 4877653
    Abstract: A method of insolubilizing solvent soluble polyimides comprising the imidized condensation products of an aromatic dianhydride and a primary aromatic diamine wherein at least one of said dianhydride or diamine is selected from the group consisting of 2,2-hexafluoro-bis(3,4-dicarboxyphenyl)propane dianhydride; 2,2-hexafluoro-bis(3-aminophenyl) propane; 2,2-hexafluoro-bis(4-aminophenyl)propane; 2,2-hexafluoro-bis-[4-(3-aminophenoxy)phenyl]propane; 2,2-hexafluoro-bis[4-(4-aminophenoxy)phenyl]propane; 1,1-bis(4-aminophenyl)-1-phenyl-2,2,2-trifluoroethane; 1,1-bis-[4-(1,2-dicarboxyphenyl)]-1-phenyl-2,2,2-trifluoroethane dianhydride and mixtures thereof.The method comprises forming a shaped article or film comprising the polyimides and subjecting same to a heat annealing process at a temperature of at least 325.degree. C. and for a period of time sufficient to insolubilize the polyimide. Preferred temperatures range from 350.degree. C. to 400.degree. C. for a period of time of at least 45 minutes to about 2 hours.
    Type: Grant
    Filed: July 12, 1988
    Date of Patent: October 31, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: Rohitkumar H. Vora, Dinesh N. Khanna, Suzanne Fontaine
  • Patent number: 4877697
    Abstract: A liquid crystal display having display filter elements in registration with display electrodes. The filters are produced using color proofing films which are imaged to produce a regular pattern of dots. Filter elements are illuminated by electrodes selection to produce changeable images.
    Type: Grant
    Filed: May 26, 1988
    Date of Patent: October 31, 1989
    Assignees: Hoechst Aktiengesellschaft, Hiechst Celanese Corporation
    Inventors: Hansjoerg W. Vollmann, George S. K. Wong, Dennis Bellville
  • Patent number: 4877502
    Abstract: A coating composition which is a uniformly dispersed admixture ofA. a fluid carrier; andB. a homopolymer or copolymer containing monomer units of the formula ##STR1## wherein R.sub.1 and R.sub.2 are preferably hydroxyalkyl and the polymer has a preferred average molecular weight in the range of from about 5,000 to about 30,000; andC. a poly(epoxide).
    Type: Grant
    Filed: July 18, 1988
    Date of Patent: October 31, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: Donna L. Keene, Darrell D. Hicks