Patents Assigned to Hoechst
  • Patent number: 4873347
    Abstract: It is possible to prepare the demalonyl compound of macrolide lactones by hydrolysis in the presence of a base without a retro-aldol cleavage occurring.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: October 10, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Hammann, Susanne Grabley, Wolfgang Raether, Bernd Ciommer, Heinz Kluge, Burkhard Sachse
  • Patent number: 4873234
    Abstract: This invention relates to isoxazolobenzoxazepines having the following formula ##STR1## wherein X.sub.1 is H; X.sub.2 is H or OH; or X.sub.1 and X.sub.2 taken together are carbonyl oxygen or ##STR2## R is (1) H, (2) loweralkyl, (3) arylloweralkyl, (4) loweralkynyl, (5) loweralkenyl, ##STR3## where R.sub.1 and R.sub.2 are independently (a) H, (b) lower alkyl, (c) arylloweralkyl, (d) lower alkylene ##STR4## where Z is H, halogen, loweralkyl, loweralkoxy, CF.sub.3, nitro or amino and n is a integer of 1 to 3; ##STR5## where n" is an integer of 1 to 3; or (f) R.sub.1 and R.sub.2 taken together with the nitrogen atom are substituted or unsubstituted piperidino or pyrrolidino of the formula ##STR6## where R.sub.3 is H, loweralkyl or aryl, and m is an integer of 1 to 2; ##STR7## wherein R.sub.4 is H or loweralkyl and m' is an integer of 3 to 4; ##STR8## where Z and n are as previously defined; ##STR9## where m'" is an integer of 1,2 or 3 ##STR10## where R.sub.5 and R.sub.
    Type: Grant
    Filed: August 1, 1988
    Date of Patent: October 10, 1989
    Assignee: Hoechst-Roussel Pharmaceuticals Inc.
    Inventors: Gregory M. Shutske, Kevin J. Kapples
  • Patent number: 4872882
    Abstract: Dyeing formulations in solid or liquid form, containing one or more red disperse dyes of the general formula (1) ##STR1## where R.sub.1 denotes an alkyl group of 1 to 4 carbon atoms, and one or more red disperse dyes of the general formula (2) ##STR2## where R.sub.2 and R.sub.3 denote independently of each other the group --CH.sub.2 --CH.sub.2 --CH.sub.2 --COOCH.sub.3 or --CH.sub.2 --CH.sub.2 --CH.sub.2 --COOC.sub.2 H.sub.5 and R.sub.
    Type: Grant
    Filed: September 1, 1988
    Date of Patent: October 10, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Manfred Hahnke, Reinhard Kuhn
  • Patent number: 4871764
    Abstract: Novel 12-halogenated forskolin derivatives, intermediates and processes for their preparation, and methods for reducing intraocular pressure utilizing the compounds or compositions are disclosed.
    Type: Grant
    Filed: November 20, 1986
    Date of Patent: October 3, 1989
    Assignee: Hoechst-Roussel Pharmaceuticals, Inc.
    Inventor: Gregory M. Shutske
  • Patent number: 4871594
    Abstract: Use of finely divided aqueous cationic dispersions of synthetic resins obtainable by emulsion polymerization from suitable monomers and which contain cationic dispersion polymers, as impregnants and primers for consolidating and priming of porous absorbent substrates, preferably inorganic substrates such as, for example, masonry, concrete, plaster surfaces, gypsum surfaces, bricks or wood, by treating these substrates with the aqueous cationic dispersions whose polymer particles have mean particle diameters of 0.02 to 0.2 .mu.m.Aqueous cationic dispersions of synthetic resins exhibit a superior penetrating and permeating power, in particular on smooth plaster surfaces and smooth gypsum surfaces, compared with aqueous anionic or non-ionic dispersions of synthetic resins.
    Type: Grant
    Filed: April 5, 1988
    Date of Patent: October 3, 1989
    Assignee: Hoechst AG
    Inventors: Erhard Bister, Hans-Ullrich Huth, Werner Stelzel
  • Patent number: 4871822
    Abstract: A reaction product of (A) compounds containing at least two R.sup.1 R.sup.2; C.dbd.CR.sup.3 --X groups (I) with (B) compounds which contain(a) at least two active H atoms or(b) at least two groups containing active H atoms of the type --AH-- (II) or(c) at least one active H atom and at least one group of the type (III),or which form the corresponding amount of this group (II), in which, the formula (I),X denotes --CO-- which is attached to a further R.sup.1 R.sup.2 C.dbd.CR.sup.3 group either directly or via the radical of a polyhydric alcohol or of an amine,R.sup.1 denotes hydrogen or a hydrocarbon radical having 1 to 10, preferably 1 to 4, carbon atoms, such as alkyl, phenyl, benzyl or naphthyl,R.sup.2 denotes hydrogen, a hydrocarbon radical having 1 to 10, preferably 1 to 4, carbon atoms, such as alkyl, phenyl, benzyl or naphthyl, an ester group containing the radical R.sup.4 of a monohydric alcohol having up to 12 carbon atoms, --CN, --NO.sub.2 or a CO--NHR.sup.1 or CO--R.sup.1 group, andR.sup.
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: October 3, 1989
    Assignee: Hoechst AG
    Inventors: Gerhard Brindopke, Gerd Walz, Karl Waldmann, Manfred Schon, Hans-Jerg Kleiner
  • Patent number: 4871879
    Abstract: In the hydroformylation of alkenes to aldehydes, rhodium is recovered from the stripped overhead of the hydroformylation reactor by condensing the overhead, removing the bulk of the aldehyde product from the condensed overhead, stripping the residue which remains with nitrogen gas to remove minor amounts of highly volatile aldehyde product remaining in the residue and redistilling the residue to remove components from the condensed overhead which are lower boiling than the catalyst components. The catalyst components including rhodium and phosphine ligand are returned to the hydroformylation reactor.
    Type: Grant
    Filed: October 27, 1987
    Date of Patent: October 3, 1989
    Assignee: Hoechst Celanese Corporation
    Inventor: Keith A. Laird
  • Patent number: 4871833
    Abstract: Described are polyamic acids, at least 50 mole-% of which are comprised of recurrent units corresponding to the general formula I: ##STR1## wherein, R.sup.1 is a mono-, di-, tri- or tetranuclear aromatic group andX is O, S, CO, SO.sub.2 or CR.sup.2 R.sup.3, each one ofR.sup.2 and R.sup.3 being H or CH.sub.3.A polyamic acid of the present invention, in the form of a solution, is applied to a substrate, for example, a semiconductor device, to form a protective layer thereon, and is converted into polyimide by heating. As against comparable compounds known in the art, the polyamic acids of the present invention are distinguished by a lower inherent viscosity at an unchanged molecular weight and, consequently, by an improved processability at an equally good thermal stability.
    Type: Grant
    Filed: May 4, 1987
    Date of Patent: October 3, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Bernd Hupfer
  • Patent number: 4871734
    Abstract: Thienoimidazole-toluidines of the formula I ##STR1## in which A represents ##STR2## T denotes --S--, --SO-- or --SO.sub.2 --, and R.sup.1 to R.sup.9 have the meanings stated in the description, and a process for their preparation, pharmaceutical compositions containing them, and their use as inhibitors of gastric acid secretion, are described.
    Type: Grant
    Filed: November 20, 1987
    Date of Patent: October 3, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Jochen Lang, Manfred Rosner, Weidmann, Klaus, Robert Rippel, Andreas W. Herling
  • Patent number: 4871791
    Abstract: The cellulose-based product, in particular in the form of a film, contains in its wall a primary, permanent plasticizer of one or more crosslinked copolymers made from at least two components. One or more of these components are monomer units containing a terminal, ethylenically unsaturated, polymerizable group or compounds of maleic acid, or fumaric acid. A further component comprises units containing thermally crosslinked groups made from N-methylolamides of unsaturated carboxylic acids. A process is furthermore described for the production of this shaped product, in which the copolymer is metered into the viscose, and the N-methylolamide groups are thermally crosslinked with the cellulose.
    Type: Grant
    Filed: April 5, 1988
    Date of Patent: October 3, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Klaus-Dieter Hammer, Manfred Siebrecht, Hermann Winter
  • Patent number: 4871423
    Abstract: Compositions and a method are disclosed for minimizing brightness reversion of chromophore-containing wood pulps, especially low-cellulose wood pulps, such as groundwood and thermomechanical pulps, which have been reductively bleached or bleached with hydrogen peroxide. Ascorbic acid and palmitoyl ascorbate are particularly effective for preventing such reversion at low levels.
    Type: Grant
    Filed: August 10, 1987
    Date of Patent: October 3, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: S. Allen Grimsley, James C. Robinson, Mark A. Schroeder
  • Patent number: 4871859
    Abstract: A novel method is disclosed for the preparation of 2,3-pyridine-dicarboxylates by the reaction of a ketoester such as dimethyl oxalacetate with an .alpha.,.beta.-unsaturated aldehyde or ketone such as 2-ethylacrolein and at least 1 molar equivalent of ammonium salt in suitable solvent utilizing a dehydrogenation catalyst such as palladium on carbon.
    Type: Grant
    Filed: March 2, 1988
    Date of Patent: October 3, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: B. Franklin Gupton, James H. Rea, Werner H. Mueller
  • Patent number: 4870103
    Abstract: The invention relates to plant protection agents based on aqueous microemulsions which contain, as emulsifiers, ethoxylated and phosphorylated, styryl-substituted phenols or salts thereof in combination with one or more non-phosphorylated emulsifiers belonging to the group comprising salts of (C.sub.10 -C.sub.16)-alkyl-monoglycol to -hexaglycol ether-sulfates, salts of .alpha.-(C.sub.14 -C.sub.19)-alkenol sulfates, salts of optionally chlorinated (C.sub.13 -C.sub.18)-alkanesulfonic acids, salts of dodecylphenylsulfonic acid, amine oxethylates or .alpha.(C.sub.9 -C.sub.20)-alkyl-.omega.-hydroxypolyoxyethylenes containing 2 to 22 moles of ethylene oxide.
    Type: Grant
    Filed: July 21, 1987
    Date of Patent: September 26, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans Rochling, Konrad Albrecht
  • Patent number: 4869994
    Abstract: Negative photoresist compositions are made from copolymers of 4-hydroxystyrene and dialkyl muconates, alkyl sorbates, alkadiene monomers or allyl esters of ethylenically unsaturated acids plus a photosensitizer.Such compositions are useful in photolithographic and photomasking operations in fabricating microelectronic devices, printed circuits, semiconductors, printing plates, dies and the like.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: September 26, 1989
    Assignee: Hoechst Celanese Corp.
    Inventors: Balaram Gupta, Palaiyur Kalyanaraman
  • Patent number: 4870088
    Abstract: Compounds I ##STR1## where A equals t-butyl or a large number of (substituted) aromatics; Y equals azolyl; or Y equals --X--R.sup.1 where X=oxygen or sulfur and R.sup.1 equals (cyclo)alkyl or (heterocyclic) aryl; or Y equals ##STR2## where R.sup.2 equals (cyclo)alkyl, acetyl or aryl; or Y equals --NR.sup.3 R.sup.4 where R.sup.3 /R.sup.4 is alkyl; or Y equals several nitrogen-containing heterocyclic rings; Z equals OH, alkylcarbonyloxy, hal, alkoxy or benzyloxy; and the salts thereof are effective antimycotics or fungicides.They are obtained by reaction of II ##STR3## with (CH.sub.3).sub.2 ##STR4## and further reaction of the compound IV ##STR5## obtained from this with a nucleophile YM (M=hydrogen or a metal equivalent).The compounds I (where Z=OH) resulting from this can be acylated or alkylated, or converted into I where Z=hal.
    Type: Grant
    Filed: March 13, 1987
    Date of Patent: September 26, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ernst Blume, Wolfgang Schaper, Heinz Ehrhardt, Wolfgang Raether, Walter Dittmar, Heinz Hanel, Burkhard Sachse
  • Patent number: 4869983
    Abstract: Method and composition for a sulfonyl-containing styrene derivative of the general formula ##STR1## in which R.sub.1 and R.sub.2 are identical or different and denote hydrogen, optionally halogen-, hydroxyl-, cyano- or (C.sub.1 -C.sub.4 -alkoxy mono- or poly-substituted (C.sub.1 -C.sub.8)-alkyl or phenyl, R.sub.3 denotes hydrogen or a (C.sub.1 -C.sub.4)-alkyl or -alkoxy group, n is a number from 1 to 4 or R.sub.1, R.sub.2 and R.sub.3 together with the associated aminophenyl radical denote julolidinyl or N-(C.sub.1 -C.sub.3)-alkylcarbazol-3-yl, R.sub.4 and R.sub.5 denote hydrogen or the necessary valences for forming a condensation product with formamide derivatives, and R.sub.6 denotes a cyano group, or R.sub.4 denotes hydrogen and R.sub.5 and R.sub.6 together denote the grouping C.dbd.N--R.sub.7, with R.sub.7 being a benzoyl radical which is unsubstituted or substituted by (C.sub.1 -C.sub.4)-alkyl or -alkoxy groups, halogen, cyno, amino or mono- or di-(C.sub.1 -C.sub.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: September 26, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Albert Bender, Dieter Guenther, Juergen Lingnau
  • Patent number: 4870164
    Abstract: Symmetrical and asymmetrical disazo compounds of the formula: ##STR1## wherein: the R.sup.1 's are identical or different and are hydrogen, chlorine, bromine, methyl or methoxy;the R.sup.2 's are hydrogen, or, if the R.sup.1 's are hydrogen, the R.sup.2 's are hydrogen, methyl or ethyl, the two R.sup.2 radicals being identical or different; andn is 1 to 4and mixtures of such compounds as colorants, especially for pigmenting high molecular weight organic material.
    Type: Grant
    Filed: January 28, 1985
    Date of Patent: September 26, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Rudolf Kuhne, Heinrich Hamal
  • Patent number: 4869847
    Abstract: A novel composite of liquid crystal droplets having a diameter of no more than 0.1 micron dispersed in a synthetic resin matrix is disclosed. The novel material does not scatter light to any appreciable degree.
    Type: Grant
    Filed: March 16, 1987
    Date of Patent: September 26, 1989
    Assignee: Hoechst Celanese Corp.
    Inventors: Thomas M. Leslie, Garo Khanarian
  • Patent number: 4868008
    Abstract: An electrically conductive shaped article such as a film or fibrous material and a process for preparing the same from a polybenzimidazole shaped article is provided. The polybenzimidazole article is first contacted with cuprous ions to produce a cuprous ion-impregnated material, and subsequently is subjected to a sulfiding agent capable of sulfiding cuprous ions, and preferably washed, to produce a polybenzimidazole shaped article having covellite copper sulfide in association therewith. Also provided are electrically conductive composites and a process for preparing the same by incorporating fibrous material prepared in accordance with the process within a substantially continuous polymeric matrix.
    Type: Grant
    Filed: May 3, 1988
    Date of Patent: September 19, 1989
    Assignee: Hoechst Celanese Corp.
    Inventors: Y. M. F. Marikar, Michael M. Besso
  • Patent number: 4867538
    Abstract: In one embodiment this invention provides a light switch or light modulator device having a nonlinear optical component which is a blend of organic constituents exhibiting nonlinear optical response.
    Type: Grant
    Filed: March 20, 1987
    Date of Patent: September 19, 1989
    Assignee: Hoechst Celanese Corp.
    Inventors: Hyun-Nam Yoon, Thomas M. Leslie, Ronald N. DeMartino