Patents by Inventor Claus D. Weis
Claus D. Weis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4950819Abstract: A process for the preparation of alkali metal salts of phosphonic acid monoalkyl esters of formula ##STR1## by reacting 1 mole of a phosphonic acid ester of formula ##STR2## with 1 mole of a finely particulate alkali metal halide of formula XY. In these formulae, R is straight chain or branched C.sub.1 -C.sub.20 alkyl, R.sub.1 is C.sub.1 -C.sub.4 alkyl, X is an alkali metal cation and Y is a halogen anion.Type: GrantFiled: September 19, 1988Date of Patent: August 21, 1990Assignee: Ciba-Geigy CorporationInventors: Claus D. Weis, Peter Sutter
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Patent number: 4939285Abstract: Metal salts of phosphoric and phosphonic acid esters of formula ##STR1## wherein R is C.sub.1 -C.sub.4 alkoxy or straight chain or branched unsubstituted C.sub.1 -C.sub.20 alkyl or C.sub.2 -C.sub.6 alkenyl,R.sub.1 is hydrogen or C.sub.1 -C.sub.4 alkyl,X is a metal cation, andn is an integer from 1 to 3 corresponding to the valence of X,are prepared by reacting n moles of a phosphoric or phosphonic acid or an ester thereof, of formula ##STR2## wherein R, R.sub.1 and n are as defined above, with 1 mole of a metal X.sup.n, if desired with cooling. These salts can be used, for example, as flame retardants, fertilizers or emulsifiers for aqueous plastics dispersions.Type: GrantFiled: July 6, 1988Date of Patent: July 3, 1990Assignee: Ciba-Geigy CorporationInventors: Claus D. Weis, Peter Sutter
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Patent number: 4897484Abstract: A process is described for the preparation of compounds of the formula ##STR1## in which R and X are as defined in claim 1. The compounds of the formula (1) are valuable intermediates in the synthesis of triarylmethane dyes and triarylmethanelactones.Type: GrantFiled: December 9, 1987Date of Patent: January 30, 1990Assignee: Ciba-Geigy CorporationInventors: Claus D. Weis, Peter Sutter
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Patent number: 4740604Abstract: There are disclosed benzanthrone lactones of formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are as defined in claim 1. The benzanthrone lactones of formula (1) are important intermediates for the synthesis of novel dyes which are obtained by coupling suitable diazo components to said compounds of formula (1).Type: GrantFiled: May 15, 1987Date of Patent: April 26, 1988Assignee: Ciba-Geigy CorporationInventors: Claus D. Weis, Peter Sutter
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Patent number: 4284828Abstract: A process for the manufacture of 4,5-dichloro-2-(4-chlorophenoxy)phenol by selective chlorination of 2-phenoxyanisole with 3 to 5 molar equivalents of chlorine, in the temperature range between -10.degree. and +50.degree. C., preferably between 0.degree. and 30.degree. C., in a lower halogenated aliphatic hydrocarbon, a lower aliphatic nitrile, in dimethyl formamide, dimethylmethanephosphonate or methanol, preferably in dimethyl formamide, dimethylmethanephosphonate, methanol, acetonitrile, propionitrile, chloroform, methylene chloride, 1,2-dichloroethane or tetrachloroethane, and demethylation of the 4,5-dichloro-2-(4-chlorophenoxy)anisole obtained as intermediate with an acid.Type: GrantFiled: November 9, 1979Date of Patent: August 18, 1981Assignee: Ciba-Geigy CorporationInventor: Claus D. Weis
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Patent number: 4282358Abstract: Substituted N-methylbenzoxazines of the formula ##STR1## wherein the ring A can also contain a nitrogen atom as ring member, each of R.sub.1 and R.sub.3 independently is hydrogen, lower alkyl, halogen, nitro or trifluoromethyl, each of R.sub.2 and R.sub.4 independently is hydrogen or halogen and each of m and n is an integer from 1 to 3, are obtained by cyclizing compounds of the formula ##STR2## wherein A, R.sub.2, R.sub.4, m and n are as defined above, R is chlorine or bromine, and each of R.sub.1 ' and R.sub.3 ' independently is hydrogen, lower alkyl, halogen or trifluoromethyl, in the presence of dimethylmethanephosphonate, at reflux temperature, and, if desired, nitrating the resultant compounds.Type: GrantFiled: December 31, 1979Date of Patent: August 4, 1981Assignee: Ciba-Geigy CorporationInventor: Claus D. Weis
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Patent number: 4259495Abstract: A novel process for producing 2,3,5,6-tetrachloropyridine is described. In this process, pentachloropyridine is reacted, in an alkanephosphonic acid dialkyl ester (dialkyl alkane phosphonate) having 1 to 4 carbon atoms in each of the alkyl groups or in a phosphoric acid trialkyl ester (trialkyl phosphate) having 1 to 4 carbon atoms in each of the alkyl groups as the solvent, at 60.degree. to 120.degree. C., in the presence of 1.4 to 2.8 mols, per mol of pentachloropyridine, of an ammonium salt of an inorganic or organic acid, with 1.2 to 1.6 gram atoms of zinc per mol of pentachloropyridine, with selective dechlorination of the pentachloropyridine in the 4-position occurring.2,3,5,6-Tetrachloropyridine is a valuable commercial product, which can be used for producing insecticidal formulations. Furthermore, 2,3,5,6-tetrachloropyridine is used as intermediate for the production of herbicidally effective .alpha.-[4-(3',5',6'-trichloropyrid-2'-yloxy)-phenoxy]-alkanecarboxylic acids and derivatives thereof.Type: GrantFiled: September 10, 1979Date of Patent: March 31, 1981Assignee: Ciba-Geigy CorporationInventor: Claus D. Weis
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Patent number: 4258194Abstract: A novel process for producing 2,3,5-trichloropyridine is described. In this process, 2,3,4,5-tetrachloropyridine is reacted, in an alkanephosphonic acid dialkyl ester (dialkyl alkane phosphonate) having 1 to 4 carbon atoms in each of the alkyl groups or in a phosphoric acid trialkyl ester (trialkyl phosphate) having 1 to 4 carbon atoms in each of the alkyl groups as the solvent, at 60.degree. to 120.degree. C., in the presence of 1.4 to 2.8 mols, per mol of 2,3,4,5-tetrachloropyridine, of an ammonium salt of an inorganic or organic acid, with 1.2 to 1.6 gram atoms of zinc per mol of 2,3,4,5-tetrachloropyridine, the 2,3,4,5-tetrachloropyridine being selectively dechlorinated in the 4-position.2,3,5-Trichloropyridine is a valuable intermediate for producing herbicidally effective .alpha.-[4-(3',5'-dichloropyrid-2-yloxy)-phenoxy-]-alkanecarboxylic acids and derivatives thereof.Type: GrantFiled: September 10, 1979Date of Patent: March 24, 1981Assignee: Ciba-Geigy CorporationInventors: Claus D. Weis, Peter Sutter
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Patent number: 4198529Abstract: The invention provides a process for the production of alkoxy-substituted polycyclic aromatic compounds from corresponding hydroxy-substituted compounds.Type: GrantFiled: January 8, 1979Date of Patent: April 15, 1980Assignee: Ciba-Geigy CorporationInventors: Maurice Grelat, Claus D. Weis
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Patent number: 4151210Abstract: Phenylalkyl sulphones of the formula ##STR1## wherein R represents hydrogen, halogen or alkyl of 1 to 4 carbon atoms,R.sub.1 represents alkyl of 1 to 4 carbon atoms, andR.sub.2 represents hydrogen, and, if R is hydrogen, or alkyl, also represents nitro,Are obtained by reaction of a corresponding sulphinic acid derivative or a salt thereof with a dialkyl alkanephosphonate.Type: GrantFiled: June 12, 1978Date of Patent: April 24, 1979Assignee: Ciba-Geigy CorporationInventor: Claus D. Weis
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Patent number: 4015007Abstract: Compounds of the class of spiro[norbornane-2,3'-piperidines], spiro[bicyclo[2.2.2]octane-2,3'-piperidines], and corresponding spiro-pyrrolidine derivatives which are unsubstituted at the ring nitrogen atom or substituted by neutral or basic radicals, and the pharmaceutically acceptable acid addition salts of these new compounds possess valuable pharmacological properties and are active ingredients for pharmaceutical compositions. In particular, these new compounds have an antiviral activity. Specific embodiments are (1RS,2RS,4SR)-spiro[norbornane-2,3'-piperidine]-hydrochloride and 1'-[2-(2-azaspiro[5.5]undec-2-yl)-ethyl]-spiro[bicyclo[2.2.2]octane-2,3'-p iperidine]-dihydrochloride.Type: GrantFiled: July 23, 1975Date of Patent: March 29, 1977Assignee: Ciba-Geigy CorporationInventors: Karl Schaffner, Alex Meisels, Jean Claude Roger, Claus D. Weis