Patents Assigned to Hoechst
  • Patent number: 4845102
    Abstract: Therapeutic agent for the treatment of peptic ulcer disease comprising as active ingredient at least one compound of formula I ##STR1## wherein R.sub.1 =5-oxohexyl,R.sub.2 =methyl orR.sub.3 =C.sub.2 -C.sub.4 -alkyl or one compound of formula I,whereinR.sub.1 =4-oxopentyl,R.sub.2 =methyl or ethyl, andR.sub.3 =C.sub.2 -C.sub.4 alkyl,is disclosed, together with a process for using the agent.
    Type: Grant
    Filed: October 2, 1987
    Date of Patent: July 4, 1989
    Assignee: Hoechst Japan Limited
    Inventors: Masao Sakurai, Masayoshi Goto, Toshizo Tanaka
  • Patent number: 4845189
    Abstract: An aqueous coating composition is provided for thermoplastic films comprising(i) from 1 to 10 weight percent, based upon the total weight of the coating composition, of a sulfonated copolyester consisting essentially of the polyester condensation product of the following monomers or their polyester-forming equivalents:(A) about 65 to 95 mole percent of isophthalic acid;(B) about 0 to 30 mole percent of at least one aliphatic dicarboxylic acid of the formula HOOC(CH.sub.2)--.sub.n COOH, wherein n ranges from about 1-11;(C) about 5 to about 15 mole percent of at least one sulfomonomer containing an alkali metal sulfonate group attached to a dicarboxylic aromatic nucleus; and(D) stoichiometric quantities of about 100 mole percent of at least one copolymerizable aliphatic or cycloaliphatic alkylene glycol having about from 2 to 11 carbon atoms,(ii) from 0.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: July 4, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: David Rudd, Sandra W. Rice
  • Patent number: 4845032
    Abstract: The invention relates to a process for the isolation and purification of .alpha.-interferons by (a) dissolution of the interferon-containing crude product in guandine. HCl solution and precipitation by dilution with water and/or (b) by chromatography on an HIC column under renaturing conditions.
    Type: Grant
    Filed: March 21, 1986
    Date of Patent: July 4, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Rainer Obermeier
  • Patent number: 4845011
    Abstract: A photo polymerization initiator composition is disclosed. The composition is comprised of an in admixture with an acridine, initiator compound. The initiator composition is useful is preparing photopolymerizable compositions having increased effective photospeed.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: July 4, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: Wojciech A. Wilczak, Margaret W. Geiger
  • Patent number: 4845515
    Abstract: Provided is a recording material comprised of a substrate and a metallic recording layer, with the metallic recording layer comprising alternating layers of Bi and Se metal. At least five such alternating layers are used to comprise the recording layer, with from 13 to 17 layers being preferred. The resulting recording material exhibits improved sensitivity, excellent storage stability and archivability, as well as good signal-to-noise ratio.
    Type: Grant
    Filed: August 19, 1987
    Date of Patent: July 4, 1989
    Assignee: Hoechst Celanese Corp.
    Inventor: Suk Y. Suh
  • Patent number: 4845087
    Abstract: Crystallized cephem-acid addition salts of the general formula ##STR1## pharmaceutical preparations which contain such cephem derivatives and are active against bacterial infections, a process for the preparation of the cephem derivatives and the pharmaceutical preparations, and the use of the cephem derivatives for combating bacterial infections.
    Type: Grant
    Filed: February 23, 1988
    Date of Patent: July 4, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Rudolf Lattrell, Walter Durckheimer, Reiner Kirrstetter
  • Patent number: 4845183
    Abstract: Heat resistant, shapable, hydroxy and/or alkoxy-substituted polyamides derived from at least one diamine selected from unsubstituted and substituted 4,4'-bis[2-(4-amino-3-hydroxyphenyl)hexafluoroisopropyl)]diphenyl ether 4,4'-bis-[2-(3-amino-4-hydroxyphenyl)hexafluoroisopropyl]diphenyl ether and a dicarboxylic acid or a derivative thereof e.g. its acid halo or ester. The polyamides of the invention may be thermally cured to form polybenzoxazoles of higher heat resistance which are stable to hydrolytic, chemical and radiation attack.The polyamides of the invention may be formed into shaped articles by molding, extrusion and solvent casting processes preferably in the presence of a solvent or diluent and then optionally converted into heat resistant, insoluble polybenzoxazoles. These shaped articles are useful in aircraft, electronic and other commercial applications where heat, chemical and radiation resistance are desired in conjunction with good mechanical and electrical properties.
    Type: Grant
    Filed: November 24, 1987
    Date of Patent: July 4, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: Werner H. Mueller, Dinesh N. Khanna
  • Patent number: 4842776
    Abstract: Styrylaryloxy ether sulfonates of the formula ##STR1## in which either R.sub.1 denotes styryl and simultaneously R.sub.2 and R.sub.3 are identical or different and denote hydrogen or styryl, or R.sub.1 and R.sub.2 are nonidentical and each denote methyl or styryl and simultaneously R.sub.3 denotes hydrogen or styryl, x denotes a number from 2 to 20, and M denotes an ammonium or alkali metal cation. These compounds are suitable as surfactant auxiliaries in oil recovery.
    Type: Grant
    Filed: October 22, 1987
    Date of Patent: June 27, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Manfred Schmidt, Walter Rupp, Gerhart Schneider, Eva M. Kohn
  • Patent number: 4842990
    Abstract: A presensitized printing plate suitable for waterless planographic printing is disclosed which comprises a layer support, a radiation-sensitive layer containing(a) a compound possessing at least one C--O--C bond, which can be split by acid(b) a compound forming a strong acid upon irradiation, and(c) a water-insoluble binder, an outer, ink-repellent, crosslinked silicone elastomer layer, and an intermediate layer comprising amorphous silicic acid by which the adhesion of the silicone elastomer layer to the radiation-sensitive layer is improved. The photosensitivity of this printing plate is considerably improved, as compared to known negative-working printing plates that can be used for waterless offset printing. The processes of making and using the presensitized printing plate are also disclosed.
    Type: Grant
    Filed: August 20, 1987
    Date of Patent: June 27, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Heinz Herrmann, Hans-Joachim Schlosser, Susanne Billino
  • Patent number: 4843079
    Abstract: There are disclosed compounds having the formula ##STR1## wherein n is 1-4; R is hydrogen, loweralkyl or loweralkylcarbonyl; R.sub.1 is hydrogen, loweralkyl, loweralkylcarbonyl, aryl, diloweralkylaminoloweralkyl, arylloweralkyl, diarylloweralkyl, oxygen-bridge arylloweralkyl, or oxygen-bridged diaryllowerallyl; A is a direct bond or (CHR.sub.3).sub.m, m being 1-3; X is hydrogen, loweralkyl, cycloalkyl,, loweralkoxy, halogen, hydroxy, nitro, trifluoromethyl, formyl, loweralkylcarbonyl, arylcarbonyl, --SH, loweralkylthio, --NHCOR.sub.4 or --NR.sub.5 R.sub.6, R.sub.4 being hydrogen or loweralkyl, and R.sub.6 and R.sub.6 being independently hydrogen, loweralkyl or cycloalkyl; Y is O, S or NR.sub.7 ; and each R.sub.2, each R.sub.3 and R.sub.
    Type: Grant
    Filed: April 4, 1988
    Date of Patent: June 27, 1989
    Assignee: Hoechst-Roussel Pharmaceuticals, Inc.
    Inventors: Gregory M. Shutske, Richard C. Effland
  • Patent number: 4842982
    Abstract: Disclosed is a radiation-sensitive recording material comprising a support, a radiation-sensitive recording layer and a rough covering layer which is applied by spraying and drying a solution which has substantially the same composition as the recording layer. Due to its rough surface, the material provides for accelerated vacuum contact in the copying process. Also disclosed is a process for producing the radiation-sensitive recording material described above.
    Type: Grant
    Filed: June 9, 1987
    Date of Patent: June 27, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Markus Seibel, Guenther Kaempf
  • Patent number: 4842740
    Abstract: This invention discloses novel membranes comprised of a blend of polyarylate and polybenzimidazole polymers. A membrane prepared from the blend of polybenzimidazole and polyarylate polymers exhibits enhanced properties over membranes prepared solely from either a polyarylate or a polybenzimidazole polymer. The addition of the polyarylate to the polybenzimidazole membrane allows the composition to be more thermally processable and less susceptible to moisture. The presence of the polybenzimidazole renders the polyarylate less reactive to solvents and increases its thermal stability. In addition, it has been surprisingly found that membranes prepared from the polybenzimidazole polyarylate blends show high regeneration capacity while retaining good flux ranges. The membranes prepared by this process exhibit good separation characteristics and provide an improved membrane with enhanced qualities over prior art membranes.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: June 27, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: Tai-Shung Chung, Paul N. Chen, Sr., Vincent J. Provino
  • Patent number: 4842988
    Abstract: A presensitized printing plate suitable for waterless planographic printing is disclosed, which comprises a layer support, a radiation-sensitive layer, an outer, ink-repellent, cross-linked silicone elastomer layer, and an intermediate layer of amorphous silicic acid, by which the adhesion of the silicone elastomer layer to the radiation-sensitive layer is improved. The adhesive layer is physiologically safe and effects a good anchoring of the silicone elastomer layer. The process of making and using the presensitized printing plate are also disclosed.
    Type: Grant
    Filed: August 20, 1987
    Date of Patent: June 27, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Heinz Herrmann, Hans-Joachim Schlosser
  • Patent number: 4843115
    Abstract: An oxymethylene polymer composition which exhibits a reduced tendency to form mold deposits upon molding, reduced tendency to discolor under thermal stress and low extractable formaldehyde levels is provided by utilizing as a stabilizer a major amount of superpolyamide and a minor amount of a cyclic amidine compound of the formula: ##STR1## wherein R is phenyl, polynuclear aromatic, heterocyclic, cycloaliphatic and aliphatic containing at least 6 carbon atoms, as well as substituted derivatives of the listed substituents.
    Type: Grant
    Filed: February 9, 1988
    Date of Patent: June 27, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: Andrew B. Auerbach, James L. Paul, K. M. Natarajan
  • Patent number: 4842950
    Abstract: An improved overlay proofing film comprising a substantially transparent polyester base film which is first coated on one or both sides with a non-light sensitive composition having a refractive index of about 1.6, said non-light sensitive composition consisting essentially of a copolymer of polymethyl methacrylate and methacrylic acid.
    Type: Grant
    Filed: May 26, 1988
    Date of Patent: June 27, 1989
    Assignee: Hoechst Celanese Corporation
    Inventor: O. Alfred Barton
  • Patent number: 4842901
    Abstract: A coating solution for producing glassy layers on a substrate comprises a silicic acid ester, an aliphatic alcohol as a solvent, an acid in a catalytically active quantity, and water. The alcohol contains at least 4 carbon atoms and the acid has a pK.sub.a of less than +3. The viscosity of the coating solution is table even at elevated temperatures and the amount of water added is increased. The glassy layers produced from the coating solution exhibit no striations.
    Type: Grant
    Filed: February 2, 1988
    Date of Patent: June 27, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Joachim Merrem, Werner Graf
  • Patent number: 4843167
    Abstract: The present invention describes a process for the preparation of compounds of the formula I ##STR1## in which R denotes fluorine, chlorine, bromine or (C.sub.1 -C.sub.4)alkyl,R.sup.1 denotes (C.sub.1 -C.sub.4)alkyl,R.sup.2 denotes H, methyl, methoxy, fluorine, chlorine, bromine or trifluoromethyl, andX denotes Cl or Br, by reaction of nitriles of the formula II ##STR2## with alcohols of the formula III and hydrogen chloride or bromide, which comprises carrying out the reaction under pressure at temperatures from - .degree. C. to +50.degree. C., if appropriate in the presence of a diluent, ad subsequently converting the resulting hydrochloride or hydrobromide into the free base.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: June 27, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Harald Knorr, Gerhard Salbeck
  • Patent number: 4842187
    Abstract: Described is an opaque, biaxially draw-oriented thermoplastic film for candy twist wrapping. The film is formed from a polymer mixture comprising from about 40 to about 60% by weight of polypropylene and from about 35 to about 55% by weight of polystyrene, relative to the total weight of the mixture. The mixture additionally comprises from about 5 to about 15% by weight of a filler material, relative to the total weight of the mixture.
    Type: Grant
    Filed: March 30, 1987
    Date of Patent: June 27, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Siegfried Janocha, Guenther Crass, Gunter Schloegl, Lothar Bothe
  • Patent number: 4840698
    Abstract: Apparatus for laminating a film onto a carrier. A carrier, such as, for example, a printed circuit board, a multi-layer lamination, a metal plate or a carrier layer with metal layers coated on both sides, is heated in a horizontal position on both sides over its entire surface in a heating station and is guided up to a photoresist film which is fixed vertically on suction plates of vacuum tables and which also spans a laminating station located between the vacuum tables. The photoresist film is drawn off from a single supply roll by means of a gripper bar and is guided over the vacuum tables and the laminating station. A cutting device cuts through the photoresist film transversely to its longitudinal direction.
    Type: Grant
    Filed: June 3, 1985
    Date of Patent: June 20, 1989
    Assignees: Hoechst Aktiengesellschaft, ELTI Apparatebau und Elektronik GmbH
    Inventor: Hans-Guenter E. Kuehnert
  • Patent number: 4841004
    Abstract: Stereoblock polymers of 1-olefins having long isotactic sequences are obtained at industrially favorable polymerization temperatures using a catalyst which comprises a metallocene compound having cyclopentadienyl radicals which are substituted by chiral groups, and an alumoxane.
    Type: Grant
    Filed: November 25, 1987
    Date of Patent: June 20, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Walter Kaminsky, Maria Buschermohle