Patents Represented by Attorney George R. Dohmann
  • Patent number: 5504217
    Abstract: Radical cation salts having the composition of formula I ##STR1## wherein x has a value from -0.1 to +0.2. These radical cation salts crystallize in needle form and are electric conductors. They can be incorporated in polymers to form conductive networks of crystal needles in a polymer matrix. The polymers can be used for making antistatically treated mouldings or electrodes.
    Type: Grant
    Filed: October 31, 1994
    Date of Patent: April 2, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Bruno Hilti, Ernst Minder, Carl W. Mayer, Bernd Klingert
  • Patent number: 5502192
    Abstract: An aqueous phase air oxidation process for the for the preparation of unsubstituted and substituted quinacfidone pigments is disclosed. The process involves an oxidation step wherein a 6,13-dihydroquinacridone is convened to the corresponding quinacfidone, utilizing a quinone compound and molecular oxygen as oxidizing agent, in a basic, aqueous reaction medium, in the presence of a nonionic, polar organic material which forms a second liquid phase in the basic reaction medium and which is present in a minor amount relative to the amount of aqueous base in the reaction medium. The quinacridones prepared by this process are useful as pigments.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: March 26, 1996
    Assignee: Ciba-Geigy Corporation
    Inventor: James B. Ganci
  • Patent number: 5492652
    Abstract: The present invention relates to novel dithiopentacene derivatives, to a process for their preparation, to charge transfer complexes obtained from said dithiopentacene derivatives as electron acceptors and unsubstituted or substituted ferrocene, chalcogenated fulvalenes or aromatic nitrogen compounds as electron donors. The invention further relates to a process for their preparation; to compositions comprising a plastics material and such a CT complex; and to the use of said CT complexes as electrical conductors, conveniently for the production of electrically conductive films, foils or coatings.
    Type: Grant
    Filed: March 14, 1995
    Date of Patent: February 20, 1996
    Assignee: Ciba-Geigy Corporation
    Inventor: Peter Chetcuti
  • Patent number: 5490866
    Abstract: A process is disclosed for washing-off prints or dyeings produced with dyes on cellulosic textile materials, which comprises treating the printed or dyed fabrics in an aqueous wash liquor with a washing-off formulation comprising(a) a polyvinyl pyrrolidone homopolymer or copolymer, and(b) a water softener.The inventive process makes it possible to remove unfixed dye from the fibre material completely and thus to enhance the fastness properties of the dyeings.
    Type: Grant
    Filed: May 18, 1994
    Date of Patent: February 13, 1996
    Assignee: Ciba-Geigy Corporation
    Inventor: Christian Guth
  • Patent number: 5488119
    Abstract: Compounds of formulae I and II ##STR1## wherein D is H or --OR wherein R is phenyl and R.sub.1 to R.sub.4 are H or a substituent such as phenylthio, and one of the substituents R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is a group of formula III--E-CR.sub.5 =C(R.sub.6).sub.2 (III)or R is substituted by a group of formula III, wherein E is a direct bond or --X-C(O)-- wherein X is a linking group, and R.sub.5 and R.sub.6 are each independently of the other H, halogen, C.sub.1 -C.sub.12 alkyl or C.sub.6 -C.sub.10 aryl, can be polymerised to homopolymers or copolymers. The monomers and polymers are reversible photochromic systems which can be used as color indicators, as photochemically modifiable color filters, or for the optical storage of information.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: January 30, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Evelyn Fischer-Reimann, Walter Fischer
  • Patent number: 5487761
    Abstract: The dyestuffs of the formula ##STR1## in which A, R.sub.1, M and n are as defined in claim 1, are suitable for dyeing paper with good light-fastness.
    Type: Grant
    Filed: April 20, 1994
    Date of Patent: January 30, 1996
    Assignee: Ciba-Geigy Corporation
    Inventor: Adolf Kaser
  • Patent number: 5488171
    Abstract: A compound of formula ##STR1## where R.sup.1 and R.sup.2 are independently a C.sub.1 -C.sub.10 aliphatic radical, or R.sup.1 is a C.sub.1 -C.sub.10 aliphatic radical and R.sup.2 is a C.sub.6 -C.sub.10 aromatic radical, and R.sup.3 is a C.sub.1 -C.sub.8 aliphatic radical, a C.sub.3 -C.sub.8 cycloaliphatic radical, a C.sub.6 -C.sub.15 aromatic radical or a C.sub.7 -C.sub.13 araliphatic radical, provided that R.sup.3 is not methyl when R.sup.1 and R.sup.2 are each methyl, that R.sup.3 is not ethyl when R.sup.1 and R.sup.2 are each methyl and that R.sup.2 is not p-aminophenyl when R.sup.1 is methyl and R.sup.3 is ethyl.
    Type: Grant
    Filed: February 28, 1994
    Date of Patent: January 30, 1996
    Assignee: Ciba-Geigy Corporation
    Inventor: Eric K. Baylis
  • Patent number: 5486213
    Abstract: Dye mixtures comprising at least two metal-free dyes, one of which contains two to eight sulfo groups and the other three to eight sulfo groups, the mixture comprising at most one dye having two sulfo groups, are used for the dyeing of leather. Preferably, a trichromatic dye mixture comprising at least one yellow dye, at least one red dye and at least one blue dye is used. Leather can be dyed with these dye mixtures in brilliant shades.
    Type: Grant
    Filed: June 22, 1993
    Date of Patent: January 23, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Peter Moser, Campbell T. Page, Alois Puntener
  • Patent number: 5482984
    Abstract: A composition comprising a) a thermosetting, thermoplastic or structurally crosslinked polymer and b) a charge transfer complex of formula I in the form of a network of crystal needles in the polymer matrix[A].sup..crclbar. .multidot.B.sup..sym. (I),whereinA is a compound of formula II or a mixture of compounds of formula II ##STR1## wherein the R substituents are identical and are H or C.sub.1 -C.sub.4 alkyl, or the adjacent R substituents, taken together, are --(CH.sub.2).sub.3 -- or --(CH.sub.2).sub.4 --; R.sub.1 is H or C.sub.1 -C.sub.4 alkyl; and X.sub.1 is .dbd.N--CN, and X.sub.2, X.sub.3 and X.sub.4 are each independently of one another .dbd.O or .dbd.N--CN, and B is a compound of formula III or IIIa ##STR2## wherein R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are each independently of one another H, linear or branched C.sub.1 -C.sub.18 alkyl-(Z.sub.1).sub.n --, phenyl-(Z.sub.1).sub.n -- or benzyl-(Z.sub.1).sub.n -- which are unsubstituted or substitute by C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.
    Type: Grant
    Filed: September 22, 1994
    Date of Patent: January 9, 1996
    Assignee: Ciba-Geigy Corporation
    Inventor: Peter Chetcuti
  • Patent number: 5482372
    Abstract: A flow cell for calorimetric measurements comprises a body (2) with at least one flow channel (3), which extends between an inlet opening (4) and an outlet opening (5), and a thermoelectric detector (16) for monitoring temperature changes, which occur during chemical or biochemical processes in a measuring volume (17). The measuring volume (17) is arranged in close vicinity of the outlet opening (5). The body (2) of the flow cell (1) has a good thermal conductivity of a magnitude such, that a fluid flowing through the flow channel (3) is thermostatizised prior to entering the measuring volume (17) solely by flowing through the flow channel (3) and free of any external thermostatization means. Thus, a flow cell is provided, which is capable of self-thermostatizing a fluid flowing therethrough.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: January 9, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Pierre Bataillard, Alfredo E. Bruno
  • Patent number: 5482655
    Abstract: A formulation comprisinga) at least one polythiophene in oxidised polycationic form and containing structural repeating units of formula I ##STR1## wherein R.sub.1 and R.sub.2 are each independently of the other linear or branched C.sub.1 -C.sub.18 alkyl or C.sub.2 -C.sub.18 alkoxyalkyl; or are C.sub.3 -C.sub.8 cycloalkyl, phenyl or benzyl which are unsubstituted or substituted by C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy or halogen; or R.sub.1 and R.sub.2, taken together, are linear C.sub.1 -C.sub.8 alkylene which is unsubstituted or substituted by C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, halogen, C.sub.3 -C.sub.8 cycloalkyl, phenyl, benzyl, C.sub.1 -C.sub.4 alkylphenyl, C.sub.1 -C.sub.4 alkoxyphenyl, halophenyl, C.sub.1 -C.sub.4 alkylbenzyl, C.sub.1 -C.sub.
    Type: Grant
    Filed: June 11, 1993
    Date of Patent: January 9, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Thomas Vogel, Jurgen Finter, Hartmut Bleier, Patrice Bujard
  • Patent number: 5482514
    Abstract: The present invention relates to the addition of photosensitising compounds to woodpulps and mixtures thereof for enhancing their whiteness, brightness and chromaticity, as well as to the paper making fibres so obtained and the use thereof.
    Type: Grant
    Filed: September 9, 1993
    Date of Patent: January 9, 1996
    Assignee: Ciba-Geigy Corporation
    Inventor: Axel von Raven
  • Patent number: 5482920
    Abstract: Pyrimidinyloxy- and triazinyloxy- and pyrimidinylthio- and triazinylthio-butyric acid derivatives of formula I ##STR1## wherein Q is ##STR2## A is hydroxy or a group ##STR3## and the other substituents are as described in patent claim 1, and salts of compounds of formula I, have herbicidal action and are suitable as active ingredients in weed control compositions.
    Type: Grant
    Filed: February 15, 1994
    Date of Patent: January 9, 1996
    Assignee: Ciba-Geigy Corporation
    Inventor: Christoph Luthy
  • Patent number: 5481002
    Abstract: There are disclosed compounds ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are each independently of one another hydrogen, a C.sub.1 -C.sub.12 alkyl group, a C.sub.1 -C.sub.12 alkoxy group, a C.sub.5 -C.sub.8 cycloalkyl group, a C.sub.5 -C.sub.8 cycloalkoxy group, a C.sub.5 -C.sub.8 cycloalkylthio group, a C.sub.6 -C.sub.10 aryl group, a C.sub.6 -C.sub.10 aryloxy group, a C.sub.6 -C.sub.10 arylthio group, nitro, halogen, cyano, --COOH, --COOR.sub.7, --NR.sub.8 R.sub.9 or --CONR.sub.8 R.sub.9, where R.sub.7 is C.sub.1 -C.sub.20 alkyl, C.sub.5 -C.sub.8 acycloalkyl, phenyl or phenyl-C.sub.1 -C.sub.4 alkyl, and R.sub.8 and R.sub.9 are each independently of the other hydrogen, C.sub.1 -C.sub.8 alkyl, phenyl or phenyl-C.sub.1 -C.sub.4 alkyl, X is nitrogen or CR.sub.4, Y is nitrogen or CR.sub.5 and Z is nitrogen or CR.sub.6, and R.sub.4, R.sub.5 and R.sub.6 are each independently of one another hydrogen, a straight-chain or branched C.sub.1 -C.sub.12 alkyl group or a C.sub.6 -C.sub.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: January 2, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Walter Fischer, Beat Schmidhalter, Heinz Wolleb
  • Patent number: 5472496
    Abstract: The present invention relates to novel solid solutions which comprise a quinacridonequinone component, a pyrrolo[3,4-c]pyrrole component and a third component which is a 2-anilinoacridone, a 5,6,7,8-tetrahydro-2-anilinoacridone, 2-phenoxyacridone, a 5,6,7,8-tetrahydro-2-phenoxyacridone or a mixture thereof. The solid solutions are three component solid solutions which consist of the components identified above or are four component solid solutions which additionally contain a quinacridone component. Pigment compositions containing the disclosed solid solutions and a method of pigmenting high molecular weight organic material with the solid solutions are also disclosed.
    Type: Grant
    Filed: August 11, 1994
    Date of Patent: December 5, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Shivakumar B. Hendi, Lindsay Kilmurry, Edward E. Jaffe
  • Patent number: 5472815
    Abstract: A coated material comprising a substrate which is coated with a layer of a pyrrolopyrrole of formula I ##STR1## wherein R.sub.1 and R.sub.2 may be 4-pyridyl and X.sub.1 and X.sub.2 are O, said compound of formula I being at least partially in the form of a salt of a strong acid, is suitable for use as an optical recording material and, owing to its electrical conductivity and photoconductivity, as antistatically treated material, as sensor, photoreceptor and solar battery.
    Type: Grant
    Filed: January 25, 1994
    Date of Patent: December 5, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Jin Mizuguchi, Gerald Giller, Alain C. Rochat
  • Patent number: 5466677
    Abstract: A dinucleotide analogue of formula ##STR1## where B.sup.1 and B.sup.2 are each independently a monovalent nucleoside base radical;R.sup.1 is R.sup.1.sub.a or Z;R.sup.1.sub.a, R.sup.2, R.sup.3 and R.sup.4 are each independently hydrogen, halogen or hydroxy;R.sup.5 is R.sup.5.sub.a or Z;R.sup.6 is hydrogen or R.sup.6.sub.a ;R.sup.7 is hydrogen, alkyl-N,N-dialkylphosphoramidyl or R.sup.7.sub.a, R.sup.8 is R.sup.8.sub.a or Z, or the indicated R.sup.7 O and R.sup.8 together denote an isopropylidenedioxy group;R.sup.5.sub.a and R.sup.8.sub.a are each independently hydrogen, halogen, hydroxy, --OR.sup.10, --OCOR.sup.10 or silyloxy substituted by three C.sub.1 -C.sub.15 hydrocarbyl groups;R.sup.6.sub.a and R.sup.7.sub.a are each independently a C.sub.1 -C.sub.10 aliphatic radical, a C.sub.6 -C.sub.15 aromatic radical, a C.sub.7 -C.sub.30 araliphatic radical, --COR.sup.11, --SO.sub.2 R.sup.11 or silyl substituted by three C.sub.1 -C.sub.15 hydrocarbyl groups;R.sup.9 is hydrogen, a C.sub.1 -C.sub.
    Type: Grant
    Filed: February 28, 1994
    Date of Patent: November 14, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Anthony D. Baxter, Eric K. Baylis, Stephen P. Collingwood, Roger J. Taylor, Alain De Mesmaeker, Chantal Schmit
  • Patent number: 5464545
    Abstract: A method and compositions for textile finishing utilizing non-formaldehyde-releasing, reverse water-soluble polymers as binder resins for textile finishes. Textiles treated by the disclosed method. The present invention is advantageous for health and safety reasons because it utilizes binder resins which do not release formaldehyde into the local environment.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: November 7, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Jayanti V. Isharani, James K. Raper, A. Donald Allen, Jr., John W. Middleton
  • Patent number: 5464697
    Abstract: Compounds of the formula I ##STR1## in which R.sub.1 and R.sub.2 independently of one another are C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.8 cycloalkyl which is unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl, or phenyl or benzyl which is unsubstituted or substituted by F, Cl, Br, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy or di(C.sub.1 -C.sub.6 alkyl)amino.The compounds are suitable as .pi.-acceptors and electrical semiconductors, and they can be used for antistatic finishing of objects.
    Type: Grant
    Filed: March 14, 1995
    Date of Patent: November 7, 1995
    Assignee: Ciba-Geigy Corporation
    Inventor: John Zambounis
  • Patent number: 5460630
    Abstract: Described is a process for dyeing fibrous materials made of or containing wool with anionic dyes, which comprises dyeing these materials in the presence of a wool preservative comprising at least one compound of the formulaR--O--CH.sub.2 --CH(OH)--CH.sub.2 --Y (1),where the variables are each as defined in the claims. The process makes available rub-fast level dyeings without deterioration in the quality of the wool.
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: October 24, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Philippe Ouziel, Martin Kuhn