Patents Represented by Attorney, Agent or Law Firm Susan S. Jackson
  • Patent number: 5922241
    Abstract: The deicing composition described comprises essentially a) from 87 to 99.45% by weight of an alkali metal halide and/or an alkaline earth metal halide, b) from 0.5 to 10% by weight of an alkali metal silicate and c) from 0.05 to 3% by weight of an alkali metal phosphate. It can be employed in solid form (powder, granules and the like) or as an aqueous solution. It ensures a short thaw time and protects metals, especially steel, against corrosion.
    Type: Grant
    Filed: January 21, 1998
    Date of Patent: July 13, 1999
    Assignee: Clariant GmbH
    Inventors: Wilfried Becker, Achim Stankowiak
  • Patent number: 5919933
    Abstract: The present invention relates to novel UV stabilizers of the formula (I) ##STR1## where the substituents are as defined in the description. These compounds are highly suitable for stabilizing organic material, such as plastics, surface coatings, paints and oils, against the action of light, radiation, oxygen and heat.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: July 6, 1999
    Assignee: Clariant GmbH
    Inventors: Karl Gaa, Matthias Zah, Mathias Mehrer, Gerhard Pfahler, Thomas Stahrfeldt
  • Patent number: 5919297
    Abstract: Aluminium oxide sealant compositions, concentrates, and processes employing the same are described which comprise a combination of certain sulphonated aromatic compounds and condensates of aldehydes and certain other sulphonated aromatic compounds. Unexpected improvements in seal quality are obtained using the compositions of the invention, and in the substantial absence of smut formation.
    Type: Grant
    Filed: June 19, 1997
    Date of Patent: July 6, 1999
    Assignee: Clariant Finance (BVI) Limited
    Inventor: Jean Pierre Chavannes
  • Patent number: 5910577
    Abstract: Compounds of the formula (I) ##STR1## in which R.sup.1 and R.sup.2 are identical or different and are Cl, COO(C.sub.1 -C.sub.4)-alkyl, CONH.sub.2, CONCH.sub.3, CON(CH.sub.3).sub.2 or SO.sub.2 NRR', where R and R' are identical or different and are hydrogen, C.sub.1 -C.sub.4 -alkyl or phenyl, it being possible for phenyl to be substituted by methyl, ethyl, methoxy, ethoxy or halogen,R.sup.3 is hydrogen, methyl, methoxy, ethoxy, chloro or bromo, andR.sup.4 is hydrogen, C.sub.1 -C.sub.3 -alkyl, chloro or bromo,are useful yellow pigments with high light fastness and weather fastness properties.
    Type: Grant
    Filed: July 31, 1998
    Date of Patent: June 8, 1999
    Assignee: Clariant GmbH
    Inventors: Hans Joachim Metz, Joachim Weber
  • Patent number: 5902884
    Abstract: Process for preparing N-alkylcarbazolesThe present invention relates to a process for preparing N-alkylcarbazoles of the formula I ##STR1## where R.sup.1 is (C.sub.1 -C.sub.6)-alkyl andY is hydrogen, (C.sub.1 -C.sub.6)-alkyl, (C.sub.1 -C.sub.6)-alkoxy, nitro or halogen, by reacting a carbazole of the formula II ##STR2## with an alkyl halide of the formula IIIR.sup.1 -X IIIwhere X is a halogen atom,in an inert solvent in the presence of an inorganic base and a catalyst of the formula IVR.sup.2 R.sup.3 N-(CH.sub.2).sub.n -NR.sup.4 R.sup.5 IVwheren is an integer from 2 to 8,R.sup.2, R.sup.3 and R.sup.4 are, independently of one another, hydrogen or (C.sub.1 -C.sub.4)-alkyl andR.sup.5 is hydrogen, (C.sub.1 -C.sub.4)-alkyl, amino-(C.sub.1 -C.sub.4)-alkyl or N,N-di(C.sub.1 -C.sub.4)-alkylamino-(C.sub.1 -C.sub.4)-alkyl.
    Type: Grant
    Filed: February 11, 1998
    Date of Patent: May 11, 1999
    Assignee: Clariant GmbH
    Inventors: Wolfgang Bauer, Klaus Delpy, Gert Nagl, Leonhard Unverdorben
  • Patent number: 5877325
    Abstract: Compounds of the formula I ##STR1## are claimed, as are their preparation and use, in which the radicals R.sub.1, R.sub.2 and R.sub.3 are organic substituents, L is either a lactam or a cyclic amidine and X is an appropriate anion. The novel compounds are employed as bleach activators in cleaners and detergents which have a bleaching action.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: March 2, 1999
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Matthias Loffler, Gerd Reinhardt
  • Patent number: 5869710
    Abstract: The betaine compounds described correspond to the following formula (1) ##STR1## in which RCO is an aliphatic acyl radical having 6 to 22 carbon atoms, Z is a linear polyhydroxyhydrocarbon radical having at least 3 optionally oxyalkylated hydroxyl groups, m is an integer from 1 to 4, n is an integer from 1 to 4, R.sup.1 is C.sub.1 to C.sub.4 -alkyl or C.sub.2 to C.sub.4 -hydroxyalkyl and R.sup.2 is C.sub.1 to C.sub.4 -alkyl or C.sub.2 to C.sub.4 -hydroxyalkyl. The betaine compounds and the aqueous, alcoholic or aqueous-alcoholic solutions or dispersions thereof are prepared by betainization of a corresponding tertiary amine compound with a halogenocarboxylic acid or a halogenocarboxylic acid salt. The novel betaine compounds and their solutions are suitable, in particular, for the preparation of surface-active compositions for hair and body care.
    Type: Grant
    Filed: July 25, 1996
    Date of Patent: February 9, 1999
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Bernd Papenfuhs
  • Patent number: 5853431
    Abstract: Compounds of formula (I) ##STR1## wherein R.sub.1 is H or SO.sub.3 M, ##STR2## M is hydrogen or a non-chromophoric cation and X.sup.+ is hydrogen or a non-chromophoric cation, are useful as dyes for oxidized aluminium substrates.
    Type: Grant
    Filed: November 6, 1997
    Date of Patent: December 29, 1998
    Assignee: Clariant Finance (BVI) Limited
    Inventor: Klaus Korte
  • Patent number: 5837160
    Abstract: The invention relates to cholesteric liquid-crystalline polymers containing at least one colored comonomer which absorbs light in the visible wavelength region. The colored comonomers can be bifunctional hydroxyl, amino and/or carboxyl derivatives of anthranthrone, anthraquinone, dioxazine, phthalocyanine, quinacridone, diketopyrrolopyrrole, perylene, perinone, azomethine or azo pigments or aminostilbenecarboxylic acids. Coatings containing such polymers are distinguished by coloristic effects which depend on the viewing angle and cannot be achieved by absorption pigments alone or by CLCP effect coatings.
    Type: Grant
    Filed: May 21, 1997
    Date of Patent: November 17, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Erwin Dietz, Axel Schonfeld
  • Patent number: 5834064
    Abstract: A process for preparing an effect coating having a perceived color which is dependent on the viewing angle, which comprises applying one or more non-curable cholesteric liquid-crystalline polymers, or at least one non-curable nematic liquid-crystalline polymer and at least one non-curable cholesteric liquid-crystalline polymer, in the form of a melt or in solution, to the article that is to be coated, and converting the applied polymer by temperature treatment into a film having a perceived color which is dependent on the viewing angle.
    Type: Grant
    Filed: April 1, 1997
    Date of Patent: November 10, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Erwin Dietz, Axel Schonfeld, Willi Kreuder
  • Patent number: 5826202
    Abstract: Process for the preparation of camphene by the rearrangement of .alpha.-pineneA process for the preparation of camphene by the rearrangement of .alpha.-pinene in the presence of a titanium oxide hydrate catalyst under the action of heat, wherein .alpha.-pinene is refluxed until the content of .alpha.-pinene in the reaction mixture is still at least 3% by weight, and the rearrangement is then brought to completion in a secondary reaction at a temperature below 160.degree. C.By carrying out the process in this way--refluxing to a relatively high residual content of .alpha.-pinene and performing a secondary reaction at a lower temperature--the formation of polymeric by-products is reduced. This process moreover increases the yield of camphene in that recycled tricyclene, concentrated in the distillation of the crude product, is partially rearranged to camphene or the formation of more tricyclene is reduced.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: October 20, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Manfred Gscheidmeier, Harald Haberlein, deceased, Hans Harald Haberlein, heir, Jorg Thomas Haberlein, heir, Mark Christian Haberlein, heir
  • Patent number: 5800602
    Abstract: Inclusion compounds consisting of a host compound, which is a cyclically linked polysaccharide having 3 to 100 monomeric saccharide units and forming a cavity in its molecular framework, and of one or more chemical compounds which are included in this cavity as guest compound(s), are used as charge control agents and charging improvers in electrophotographic toners and developers, in triboelectrically or electrokinetically sprayable powders and powder coatings and in electret materials.
    Type: Grant
    Filed: May 9, 1996
    Date of Patent: September 1, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Rudiger Baur, Hans-Tobias MacHoldt
  • Patent number: 5800607
    Abstract: Process for the preparation of pigment preparations, which comprises wet milling the crude pigments which are present in coarsely crystalline state, or prepigments or pigments which are present in a form in which they are difficult to disperse, in a concentration of from 20 to 60% by weight based on the total weight of the pigment preparation, in a flocculation-stable liquid medium and in a stirred ball mill which is operated with a peripheral stirrer speed of more than 12 m/s, under the action of nonmetallic grinding media with a diameter of less than or equal to 1.0 mm, until the desired degree of fine division is reached, and then isolating the pigment preparation.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: September 1, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Dieter Schnaitmann, Martin Bohmer, Manfred Urban
  • Patent number: 5783710
    Abstract: The present invention relates to benzothioxanthene dyes of the formula I, ##STR1## in which R.sup.1 is SO.sub.3.sup..crclbar. M.sup..sym. or SO.sub.2 NR.sup.4 R.sup.5, R.sup.2 and R.sup.3 independently of one another are hydrogen, SO.sub.3.sup..crclbar. M.sup..sym. or SO.sub.2 NR.sup.4 R.sup.5 and X, Y, n, R.sup.4, R.sup.5 and M.sup..sym. are as defined in claim 1, to their preparation and to their use, especially in inks and recording liquids.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: July 21, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wolfgang Bauer, Dieter Baumgart, Walter Zoller
  • Patent number: 5756691
    Abstract: Water-insoluble azo colorant based on N-acetoacetyldehydrothiotoluidine Compound of the formula (I) ##STR1## in which R.sub.1 and R.sub.2 independently of one another are a hydrogen atom, C.sub.1 -C.sub.4 -alkyl, C.sub.5 -C.sub.6 -cycloalkyl, a benzyl group, an unsubstituted phenyl group or a substituted phenyl group with 1 to 5, preferably 1 to 3, substituents from the group consisting of C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, halogen, nitro, cyano, hydroxyl, CF.sub.3, CONH.sub.2, CONH(C.sub.5 -C.sub.6 -cycloalkyl), CON(C.sub.1 -C.sub.4 -alkyl).sub.2, CONH(C.sub.1 -C.sub.4 -alkyl), COO(C.sub.1 -C.sub.4 -alkyl), COO(C.sub.5 -C.sub.6 -cycloalkyl) and CONH(phenyl),R.sub.3 is a hydrogen atom, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, halogen, nitro, cyano, hydroxyl, CF.sub.3, COO(C.sub.1 -C.sub.4 -alkyl) or COO(C.sub.5 -C.sub.6 -cycloalkyl) andn is 1 or 2.
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: May 26, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Joachim Weber, Hans Joachim Metz