Exactly Three Azo Groups Attached Indirectly To Each Other By Nonionic Bonding Patents (Class 534/809)
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Publication number: 20130314786Abstract: The present invention relates to an azo compound represented by the following formula (1) [wherein, A represents a naphthyl group having a substituent, R1 to R6 each independently represent a hydrogen atom, an alkyl group having a carbon atom number of 1 to 5, an alkoxy group having a carbon atom number of 1 to 5, a sulfo group, or an alkoxy group having a sulfo group and a carbon atom number of 1 to 5, and X represents a benzoylamino group having a substituent, a phenylamine group having a substituent, a phenylazo group having a substituent, or a naphthotriazole group having a substituent] and a salt thereof. By using the azo compound or a salt thereof of the present invention, a neutral color polarizing plate and a color polarizing plate for a liquid crystal projector being excellent in polarization performance and durability and having less color leakage in a visible light region can be provided.Type: ApplicationFiled: February 6, 2012Publication date: November 28, 2013Applicants: POLATECHNO CO., LTD., NIPPON KAYAKU KABUSHIKI KAISHAInventors: Takahiro Higeta, Takuto Nishiguchi
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Publication number: 20130269124Abstract: The present invention relates to new azo dyes, a process for their preparation, and their use for dyeing or printing fibrous materials, to produce materials with brownish shades.Type: ApplicationFiled: November 29, 2011Publication date: October 17, 2013Inventors: Helmut-Martin Meier, Christof Heide, Klaus-Günter Strumpf, Thomas Hübbe
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Publication number: 20130247309Abstract: The present invention relates to a laundry shading process with specific blue or violet bisazo-dyes alone or in combination with a photocatalyst. Further aspects of the invention are a composition comprising at least one photocatalyst and at least one of the specific bisazo-dyes. The composition is particularly useful for shading textiles during laundry. Further aspects of the invention are a detergent composition, a fabric softener composition containing these dyes or mixtures of these dyes and photocatalysts and novel blue or violet bisazo-dyes.Type: ApplicationFiled: May 13, 2013Publication date: September 26, 2013Applicant: BASF SEInventors: CARMEN ARAYA HERNANDEZ, FRANK BACHMANN, HANS KRAMER, WOLFGANG SCHLENKER, DEEPAK M. RANE
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Publication number: 20120245334Abstract: Methods and compositions are provided for detecting a primer extension product in a reaction mixture. In the subject methods, a primer extension reaction is conducted in the presence of a polymerase having 3??5? exonuclease activity and at least one FET labeled oligonucleotide probe that includes a 3??5? exonuclease resistant quencher domain. Also provided are systems and kits for practicing the subject methods. The subject invention finds use in a variety of different applications, and are particularly suited for use in high fidelity PCR based reactions, including SNP detection applications, allelic variation detection applications, and the like.Type: ApplicationFiled: November 12, 2010Publication date: September 27, 2012Applicant: LIFE TECHNOLOGIES CORPORATIONInventors: QUIN CHOU, Dragan Spasic
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Patent number: 8080101Abstract: The present invention relates to dye mixtures which comprise at least one dye of the formula (I), at least one dye of the formula (II) and optionally at least one dye of the formula (III) and/or optionally at least one dye of the formula (IV) in which D1 to D7, R201 to R203, R0, R* and R**, T, M, v and f are as defined in claim 1, to dyes of the formula (II), to processes for their preparation, and to their use for dyeing and printing hydroxyl- and carboxamido-containing materials.Type: GrantFiled: September 29, 2006Date of Patent: December 20, 2011Assignee: DyStar Colours Deutschland GmbHInventors: Joachim Eichhorn, Stefan Meier, Werner Hubert Russ
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Publication number: 20110075076Abstract: Azo compounds represented by formula (1) or (2) (In the formulas, A represents a phenyl group or naphthyl group that has at least 1 substituent. R1-R4 represent a hydrogen atom, lower alkyl group or lower alkoxy group, with at least one of R1-R4 being a lower alkoxy group that has a sulfone group. X represents an optionally substituted amino group, optionally substituted benzoylamino group, optionally substituted phenylamino group, optionally substituted phenyl azo group or optionally substituted naphthotriazole group) and salts thereof.Type: ApplicationFiled: May 19, 2009Publication date: March 31, 2011Applicants: NIPPON KAYAKU KABUSHIKI KAISHA, POLATECHNO CO., LTD.Inventors: Takuto Nishiguchi, Hiroaki Ohno, Takahiro Higeta, Yuichi Sadamitsu
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Patent number: 7276268Abstract: Poly-azo compound selected from the group consisting compounds of the formula (I) and compounds of the formula (II), (wherein, Me represents copper, nickel, zinc or iron, A represents a naphthyl group having 1 to 3 sulfonic groups and further optionally having an alkyl group or alkoxy group, R1 and R2 represent each independently a hydrogen atom, alkyl group or alkoxy group, and R3 represents an amino group or hydroxyl group.).Type: GrantFiled: November 12, 2004Date of Patent: October 2, 2007Assignee: Sumitomo Chemical Company, LimitedInventors: Toru Ashida, Narutoshi Hayashi
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Publication number: 20030187236Abstract: The objective of the present invention is to provide a high-purity trisazo compound with excellent light resistance that is useful as a coloring matter for a black aqueous ink for ink jet recording and the like.Type: ApplicationFiled: October 25, 2002Publication date: October 2, 2003Inventors: Yoshihiro Sawatari, Makiko Matsui, Shuji Sugawara
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Publication number: 20030098447Abstract: A polyazo compound or salt thereof covering the region of from 500 to 580 nm and manifesting high initial polarization ability and represented by the following formulae (I) or (II): 1Type: ApplicationFiled: July 5, 2002Publication date: May 29, 2003Inventors: Toru Ashida, Yoshiteru Ohta, Narutoshi Hayashi
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Patent number: 6140477Abstract: A polyazo compound capable of effectively absorbing near-infrared rays, which can be produced from readily available raw materials is provided, which comprises at least one --OH group or at least one group derived from --OH group at p-position of the azo group in the molecule of the polyazo compound. This compound can be produced by diazotizing a substituted or nonsubstituted aromatic monocyclic or polycyclic compound or heterocyclic compound, each having a diazotizable primary amino group, and successively coupling the resulting diazo component with an azo component having a diazotizable primary amino group, the last azo component being such that --OH group or a group derived from --OH group be present at p-position to the azo group resulting from the azo component.Type: GrantFiled: March 23, 1999Date of Patent: October 31, 2000Assignee: Hakkol Chemical Co., Ltd.Inventors: Shigekazu Matsumoto, Takao Yanagisawa, Shigehiro Matsumoto, Kunio Shimabukuro
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Patent number: 6022384Abstract: The present invention relates to a water-soluble reactive dye of the formula N(Z).sub.3, wherein each Z independently has the formula (III): ##STR1## wherein m, Q, Y and D are defined in the claims. The present invention also relates to a process for coloring a substrate that includes applying to the substrate the water-soluble reactive dye of the above formula at a pH above 7.Type: GrantFiled: February 24, 1999Date of Patent: February 8, 2000Assignee: Zeneca LimitedInventor: John Anthony Taylor
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Patent number: 5964899Abstract: Azo dyes containing sulphur dye entities as a constitutional component are dyes of valuable properties, in particular for the dyeing of leather.Type: GrantFiled: October 8, 1997Date of Patent: October 12, 1999Assignee: Clariant Finance (BVI) LimitedInventors: Jordi Berenguer, Manuel Jose Domingo, Jose Rocas
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Patent number: 5616174Abstract: An ink composition is provided which enables high-quality recording on plain paper and can record an image having excellent water resistance. The ink composition comprises a dye represented by the following formula (I): ##STR1## wherein M represents an unsubstituted or substituted ammonium, R.sup.1 represents COOM, R.sup.2 represents --P(=O)n--(OM).sub.2, where n is 0 or 1, R.sup.3 represents SO.sub.3 M, R.sup.4 and R.sup.5 independently represent H, an alkyl group, or an alkoxyl group, R.sup.6 represents H, a phenyl group which may be substituted, an alkylcarbonyl group, or an alkyl group which may be substituted with a hydroxyl or alkoxyl group, and m is 0 or 1.Type: GrantFiled: December 4, 1995Date of Patent: April 1, 1997Assignee: Seiko Epson CorporationInventors: Miharu Kanaya, Akio Owatari, Junko Takatsuna, Masahiro Yatake, Hiroko Hayashi, Takashi Ono, Yoshihiro Sawatari, Tatsuya Yagyu
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Patent number: 5178671Abstract: Provided is an ink comprising a recording agent and a liquid medium for dissolution or dispersion thereof, the recording agent being a compound represented by the general formula ##STR1## where R.sup.1 is a radical selected from the group of lower alkyl, lower alkoxy, --COOM, and --SO.sub.3 M; R.sup.2 and R.sup.3 are respectively a radical selected from the group of hydrogen, lower alkyl, lower alkoxy, amino, --NHCOCH.sub.3, --SO.sub.3 M, and --COOM; R.sup.4 and R.sup.5 are respectively a radical selected from the group of lower alkyl, lower alkoxy, --NHCOCH.sub.3, --SO.sub.3 M, and COOM; A is ##STR2## R.sup.6 is a radical selected from the group of acetyl, benzoyl, --SO.sub.2 C.sub.6 H.sub.5, --SO.sub.2 C.sub.6 H.sub.4 --CH.sub.3, phenyl, which is unsubstituted or substituted by --COOM or methyl, and ##STR3## R.sup.7 and R.sup.8 are respectively a radical selected from the group of hydrogen, hydroxyl, and --C.sub.2 H.sub.4 OH; R.sup.9 and R.sup.Type: GrantFiled: June 11, 1992Date of Patent: January 12, 1993Assignee: Canon Kabushiki KaishaInventors: Takao Yamamoto, Tsuyoshi Eida, Mayumi Yamamoto
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Patent number: 5145953Abstract: A biscyclobutarene monomer is prepared having two cyclobutarene moieties bridged by a divalent radical having at least one azo linkage. The monomers can be polymerized to form polymers exhibiting outstanding thermooxidative stability at high temperatures for prolonged time periods.Type: GrantFiled: February 2, 1988Date of Patent: September 8, 1992Assignee: The Dow Chemical CompanyInventors: Robert A. Kirchhoff, Alan K. Schrock
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Patent number: 5127946Abstract: Provided is an ink containing a recording agent and a liquid medium for dissolution or dispersion thereof, said ink comprising, as the recording agent, a compound represented by the general formula (A) ##STR1## where n is 0 or 1; R.sub.1, R.sub.2, and R.sub.3 are respectively a substituent selected from the group consisting of hydrogen, methyl, methoxy, hydroxy, amino, acetylamino, and sulfonic acid; and M is an alkali metal, ammonium, or an organic ammonium.Type: GrantFiled: January 23, 1991Date of Patent: July 7, 1992Assignee: Canon Kabushiki KaishaInventors: Tsuyoshi Eida, Takao Yamamoto, Mayumi Yamamoto
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Patent number: 4990421Abstract: An electrophotographic recording material comprising a conductive support and a photosensitive layer containing a photoconductive compound that has p-type charge generating capacity and is a trisazo compound which is the reaction product of the coupling reaction between a coupler compound that does not contain a carboxylic acid or sulphonic acid group and a diazonium salt represented by the following general formula (I): ##STR1## wherein: each of L, M and Y (same or different) represents a phenylene group including a phenylene groups substituted with one or more substituents selected from the group consisting of lower alkyl (C.sub.1 -C.sub.2), nitro, methoxy, ethoxy or halogen, or represents said phenylene group fused-on with the necessary atoms to close a saturated or unsaturated carbocyclic or heterocyclic ring or ring system including said ring or ring-system in substituted form, and X.sup.- is an anion.Type: GrantFiled: July 14, 1989Date of Patent: February 5, 1991Assignee: Agfa-Gevaert, N.V.Inventors: David R. Terrell, Marcel J. Monbaliu, Carina Geelen, Guy P. Verbeek, Frans C. De Schrijver, Mark G. Van der Auweraer
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Patent number: 4977051Abstract: An electrophotographic photoreceptor is disclosed, which comprises an electrically conductive support having thereon a layer which contains a charge carrier transporting compound and a charge carrier generating compound, or a layer which contains charge carrier transporting compound and a layer which contains a charge generating compound, wherein at least one type of tris-azo compound represented by formula (I) is included as a charge carrier generating compound: ##STR1## wherein Ar.sub.1, Ar.sub.2, Ar.sub.3, Ar.sub.4 and A are as defined in the specification.Type: GrantFiled: November 8, 1989Date of Patent: December 11, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeru Ohno, Katsuji Kitatani, Naonori Makino, Satoshi Hoshi, Hideo Sato
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Patent number: 4952677Abstract: Reddish-brown to yellow shade colorants suitable for ribbon and ball point inks are produced from the glassy waste by-product of pararosaniline manufacture by slurrying the residue in mineral acid, diazotizing, and coupling. the resulting colorants are useful in preparing inks.Type: GrantFiled: September 15, 1988Date of Patent: August 28, 1990Assignee: BASF CorporationInventors: Floyd G. Spence, Louis R. de Alvare, Robert J. Allen
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Patent number: 4952678Abstract: Trisazo dyes of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are identical or different and each, independently of the others, is hydrogen, methyl, ethyl, methoxy or chlorine, R.sup.5 is C.sub.2 -C.sub.4 -alkyl, X is C.sub.1 -C.sub.24 -mono- or dialkylamino, monobenzylamino, mono-(phenyl-ethyl)-amino, monophenylamino, N-(C.sub.1 -C.sub.12 -alkyl)-N-benzylamino, N-(C.sub.1 -C.sub.12 -alkyl)-N-(phenylethyl)amino or N-(C.sub.1 -C.sub.12 -alkyl)-N-phenylamino or each of the phenyls substituted by C.sub.1 -C.sub.12 -alkyl, cyclo-hexyl, 4-(C.sub.1 -C.sub.12 -alkyl)cyclohexyl, C.sub.1 -C.sub.24 -alkyloxy, phenoxy or C.sub.1 -C.sub.24 -alkanoyloxyl, or is OR, where R is C.sub.1 -C.sub.24 -alkyl, unsubstituted or C.sub.1 -C.sub.12 -alkyl-, cyclohexyl-, 4-(C.sub.1 -C.sub.12 -alkyl)cyclohexyl-, C.sub.1 -C.sub.24 -alkoxy-, phenoxy- or C.sub.1 -C.sub.Type: GrantFiled: October 29, 1987Date of Patent: August 28, 1990Assignee: BASF AktiengesellschaftInventor: Karl-Heinz Etzbach
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Patent number: 4910299Abstract: Disperse dyes suitable for dyeing textile material composed of polyester dyes of the formula ##STR1## in which D is the radical of a substituted or unsubstituted, homocyclic or heterocyclic diazo component belonging to the series comprising thienyl, thiazolyl, isothiazolyl, 1,2,4-thiadiazolyl, 1,3,4-thiadiazolyl, benzothiazolyl, benzoisothiazolyl, pyrazolyl, imidazolyl or phenyl,X is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, acylamino, halogen or a group of the formula -NH-CO-NHQ in which Q is hydrogen, C.sub.1 -C.sub.4 -alkyl or phenyl,Y is hydrogen, halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkoxy-C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy-C.sub.1 -C.sub.4 -alkoxy,R is hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.2 -C.sub.12 -alkenyl or phenyl, or Y and R, together with the nitrogen atom and the two C atoms linking them, form a 5-membered ring or 6-membered ring,B is a l inear or branched C.sub.2 -C.sub.6 -alkylene radical,W is halogen, C.sub.Type: GrantFiled: December 2, 1987Date of Patent: March 20, 1990Assignee: Ciba-Geigy CorporationInventors: Angelo D. Casa, Peter Liechti, Max Dempfle
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Patent number: 4875903Abstract: Compounds of the formula ##STR1## wherein each R.sub.1 is independently hydrogen, C.sub.1-4 alkyl or C.sub.1-4 alkyl monosubstituted by hydroxy, halo, cyano or C.sub.1-4 alkoxy,each of X.sub.1 and X.sub.3 is independently halo, hydroxy, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, phenyl, phenoxy, amino or an aliphatic, cycloaliphatic, aromatic or heterocyclic amino group,each of X.sub.2 and X.sub.4 is independently an aliphatic, cycloaliphatic, aromatic or heterocyclic amino group containing at least one protonatable nitrogen atom or quaternary ammonium group,m is 0 or 1, andeach of n.sub.1 and n.sub.2 is independently 0 or 1, with the proviso that n.sub.1 +n.sub.2 is 1 or 2,wherein each halo is independently fluoro, chloro or bromo, with the provisos that (1) the total number of basic and cationic groups present as X.sub.1 -X.sub.Type: GrantFiled: June 5, 1987Date of Patent: October 24, 1989Assignee: Sandoz Ltd.Inventor: Reinhard Pedrazzi
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Patent number: 4836827Abstract: The compounds of the formula (1) given in claim 1 are suitable for use as dyes for dyeing a wide range of textile and non-textile materials and in particular for dyeing leather and pelts.Type: GrantFiled: January 29, 1988Date of Patent: June 6, 1989Assignee: Ciba-Geigy CorporationInventor: Alois Puntener
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Patent number: 4830944Abstract: A function separated type electrophotographic photosensitive member for infrared rays comprises a combination of a charge generation material and a charge transport material, wherein the electrophotographic photosensitive member for infrared rays contains as the charge generation material a disazo pigment represented by Formula (1).Type: GrantFiled: December 19, 1986Date of Patent: May 16, 1989Assignee: Canon Kabushiki KaishaInventors: Shoji Umehara, Masakazu Matsumoto, Takao Takiguchi, Shozo Ishikawa
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Patent number: 4793860Abstract: An aqueous ink composition comprises (a) a dye having formula (I) in an amount of 0.5 to 6.0 wt. %, in which 20% or more of the total of the cations of --SO.sub.3 X and --OX groups directly connected to the aromatic rings thereof is replaced by Li.sup.+ ion or a quaternary ammonium ion, ##STR1## wherein X represents a cation; R.sup.1 represents hydrogen, a hydroxyl group, an alkyl group having 1 to 4 carbon atoms, or an amino group; R.sup.2 represents ##STR2## (in which R.sup.5 and R.sup.6 each represent hydrogen, an alkyl group having 1 to 4 carbon atoms, a hydroxyethyl group, or a cyanoethyl group); R.sup.3 represents hydrogen, --SO.sub.3 X; R.sup.4 represents hydrogen, or a --C.sub.2 H.sub.4 OX, (b) a polyhydric alcohol in an amount of at least 10 wt. %; and (c) water.Type: GrantFiled: April 2, 1987Date of Patent: December 27, 1988Assignee: Ricoh Company, Ltd.Inventors: Kakuji Murakami, Masaru Shimada, Tamotsu Aruga, Hiroyuki Uemura, Kiyofumi Nagai
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Patent number: 4743523Abstract: A photosensitive member for electrophotography comprising a photosensitive layer containing an azo pigment selected from those represented by the following formulas (1)-(6): ##STR1## wherein R is an alkyl, aralkyl, aryl, or acyl each capable of having a substituent; Ar is an arylene or heterocyclic group each capable of having a substituent; Ar is a coupler residue group having a phenolic OH group; B is hydrogen, nitroso, or an alkyl, aralkyl, aryl or acyl group capable of having a substituent; and n is 0 or 1.Type: GrantFiled: March 27, 1986Date of Patent: May 10, 1988Assignee: Canon Kabushiki KaishaInventors: Masataka Yamashita, Takao Takiguchi, Shoji Umehara, Masakazu Matsumoto, Shozo Ishikawa
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Patent number: 4735882Abstract: An electrophotographic photosensitive member comprises a photosensitive layer containing an azo pigment selected from the following general formulae (1) to (5): ##STR1## wherein groups Ar are arylene groups and divalent heterocyclic groups, each of which may contain a substituent; n is 0 or 1; and group A is a coupler residue group having a phenolic OH group.Type: GrantFiled: April 1, 1986Date of Patent: April 5, 1988Assignee: Canon Kabushiki KaishaInventors: Masataka Yamashita, Takao Takiguchi, Shoji Umehara, Masakazu Matsumoto, Shozo Ishikawa
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Patent number: 4724259Abstract: Compounds of the general formula I ##STR1## where R.sup.1 and R.sup.2 independently of one another are each C.sub.6 -C.sub.24 -alkyl or are each benzyl which is unsubstituted or substituted by alkyl or by cycloalkyl, and one of the radicals may furthermore be hydrogen, and the rings A, B, C and D can be further substituted by chlorine, methyl or methoxy, with the exception of the compound of the formula ##STR2## are useful as dyes in electrooptical liquid crystal displays or for the production of polarization films.Type: GrantFiled: November 21, 1984Date of Patent: February 9, 1988Assignee: BASF AktiengesellschaftInventors: Karl-Heinz Etzbach, Werner Juenemann, Johannes Dehnert
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Patent number: 4721779Abstract: Trisazo compounds of the formula ##STR1## where Z is ##STR2## X and Y independently of one another are each C.sub.1 -C.sub.24 -alkoxy, benzyloxy, phenylethoxy, mono-C.sub.1 -C.sub.24 -alkylamino, monobenzylamino, monophenylethylamino, monophenylamino, bis-C.sub.1 -C.sub.24 -alkylamino, N-C.sub.1 -C.sub.12 -alkyl-N-benzylamino, N-C.sub.1 -C.sub.12 -alkyl-N-phenylethylamino or N-C.sub.1 -C.sub.12 -alkyl-N-phenylamino, where the benzene rings are unsubstituted or substituted by C.sub.1 -C.sub.12 -alkyl, cyclohexyl, 4-C.sub.1 -C.sub.12 -alkylcyclohexyl, C.sub.1 -C.sub.24 -alkoxy, phenoxy or C.sub.1 -C.sub.24 -alkanoyloxy, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 independently of one another are each hydrogen, methyl, methoxy, or chlorine and R.sup.7 is hydrogen or methyl, and the ring A or B may furthermore carry a fused benzene ring, are very useful as dyes in liquid crystal media, for example for electrooptical displays.Type: GrantFiled: August 5, 1986Date of Patent: January 26, 1988Assignee: BASF AktiengesellschaftInventor: Karl-Heinz Etzbach
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Patent number: 4670548Abstract: Water-soluble dyestuffs of the formulaA--N.dbd.N--B--N.dbd.N--C--N.dbd.N--KwhereinA denotes sulphophenyl or sulphonaphthyl, which are optionally further substituted,B denotes sulpho-1,4-naphthylene, which is optionally further substituted,C denotes 1,4-phenylene or 1,4-naphthylene, which are optionally further substituted, andK denotes the radical of an optionally functionally modified coupling component of the hydroxybenzene series, aminobenzene series, aminopyrazole series, pyridone series or acetoacetic acid arylide series, or of barbituric acid or citrazinic acid,and their use for dyeing nitrogen-containing fibre materials, such as wool and polyamide, and for dyeing leather.Type: GrantFiled: March 24, 1980Date of Patent: June 2, 1987Assignee: Bayer AktiengesellschaftInventors: Jochen Westphal, Hermann Henk
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Patent number: 4594410Abstract: Azo dyes of the formula ##STR1## and external salts thereof, wherein F is the residue of a monoazo or disazo compound in 1:1 metal complex form or of a trisazo, disazoazoxy or tetrakisazo compound in metal-free or 1:1 metal complex form,each X is independently --NR.sub.2 --Q--NR.sub.3 R.sub.4 or --NR.sub.2 --Q--N.sup..sym. R.sub.5 R.sub.6 R.sub.7,whereinQ is linear or branched C.sub.2-6 alkylene or --NH--CO--CH.sub.2 --,R.sub.2 is hydrogen or C.sub.1-4 alkyl,each of R.sub.3 and R.sub.4 is independently hydrogen; C.sub.1-6 alkyl; C.sub.2-6 alkyl monosubstituted by cyano or hydroxy in the 2-, 3-, 4-, 5- or 6-position; phenyl(C.sub.1-3 alkyl); phenyl(C.sub.1-3 alkyl) having, on the phenyl ring, 1, 2 or 3 substituents selected from chloro, C.sub.1-4 alkyl and C.sub.1-4 alkoxy; C.sub.5-6 cycloalkyl or C.sub.5-6 cycloalkyl substituted by 1, 2 or 3 C.sub.1-4 alkyl groups or --NR.sub.3 R.sub.Type: GrantFiled: August 18, 1982Date of Patent: June 10, 1986Assignee: Sandoz Ltd.Inventor: Reinhard Pedrazzi