Patents by Inventor Andrew H. M. Renfrew
Andrew H. M. Renfrew 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: 5474580Abstract: A process for the coloration of a substrate, especially a textile, comprising the steps of:(a) applying to the substrate a mixture comprising an aqueous solvent and a water-soluble dye comprising molecules which contain a nucleophilic group and an electrophilic group; and(b) heating or basifying or heating and basifying the dye thereby causing molecules of the dye to join together.Also claimed are dyes, polymers and oligomers.Type: GrantFiled: November 29, 1993Date of Patent: December 12, 1995Assignee: Zeneca LimitedInventors: Andrew H. M. Renfrew, Andrew P. Shawcross
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Patent number: 5306813Abstract: A compound which, in the free acid form, is of Formula (1): ##STR1## wherein: D is optionally substituted phenyl or optionally substituted naphthyl;K is optionally substituted phenylene or optionally substituted naphthylene;R.sup.1 and R.sup.4 are each independently H or optionally substituted alkyl;R.sup.2 and R.sup.3 are each independently H or optionally substituted alkyl, provided at least one of R.sup.2 and R.sup.3 is optionally substituted alkyl;B is H, optionally substituted alkyl or optionally substituted each A is H or a substituent; andeachA is H or a substituent; andL is an optionally substituted divalent organic radical. The compound is useful as a reactive dye for textiles.Type: GrantFiled: January 22, 1993Date of Patent: April 26, 1994Assignee: Imperial Chemical Industries PLCInventors: Andrew H. M. Renfrew, John A. Taylor
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Patent number: 5171852Abstract: Triphenodioxazine reactive dyes, useful for dyeing cellulosic fibers, of the formula: ##STR1## wherein each of T.sup.1 and T.sup.2, independently, represents H, Cl, Br, F, SO.sub.3 H or an optionally substituted alkyl or aryl radical;R.sup.1 represents H or an optionally substituted hydrocarbon or heterocyclic radical;R.sup.2 represents an optionally substituted hydrocarbon radical;A represents C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy, Cl, COOH or SO.sub.3 H, andn has a value of 0 or 1,the nature of the substituents being such that the dyes contain at least two SO.sub.3 H groups and at least two fibre-reactive groups.Type: GrantFiled: April 25, 1990Date of Patent: December 15, 1992Assignee: Imperial Chemical Industries PLCInventors: Andrew H. M. Renfrew, Denis R. A. Ridyard, Brian Lamble
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Patent number: 4542213Abstract: Triphenodioxazine dyes which, in the free acid form, have the formula: ##STR1## wherein A is Cl or Br; Y is cyclopentylene, cyclohexylene or (CH.sub.2).sub.x where x is 2, 3 or 4; andZ is NRCO.sub.2 R.sup.1 or ##STR2## wherein R is H, optionally substituted alkyl or optionally substituted aryl;R.sup.1 is optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl; andR.sup.2 is --CH.dbd.CH--,--CH.dbd.CH--CH.sub.2 --,--(CH.sub.2)--.sub.2-4 or a 1,2-radical of a 5 or 6 membered carbocyclic compound;or, when Y is cyclopentylene or cyclohexylene, Z may also be H or alkyl, alkoxy, aryl, aryloxy, cycloalkyl, cycloalkoxy or amino, all of which may be optionally substituted.Type: GrantFiled: March 15, 1984Date of Patent: September 17, 1985Assignee: Imperial Chemical Industries PLCInventors: Robert D. McClelland, Andrew H. M. Renfrew
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Patent number: 4512773Abstract: A dyestuff of formula: ##STR1## wherein: the groups X.sub.1 and X.sub.2 are independently hydrogen, halogen, alkyl, aryl, alkoxy, cyano, optionally substituted amino or carboxylic acid ester groups; (R).sub.n represents n substituents R each of which is independently halogen, lower alkyl, lower alkoxy or --COOH and n is 0 or 1; R.sub.1 is hydrogen, or optionally substituted lower alkyl; Y is an optionally substituted aliphatic or optionally substituted araliphatic group; R.sub.2 is hydrogen, optionally substituted lower alkyl, optionally substituted aryl or optionally substituted aralkyl; R.sub.3 is hydrogen or an optionally substituted alkyl or aralkyl group; A.sup.- is an anion; a is 0 or 1; and Z is hydrogen, optionally substituted lower alkyl, optionally substituted aryl or optionally substituted aralkyl.The dyes are useful for the coloration of materials such as textiles, leather, inks and lacquers.Type: GrantFiled: May 10, 1983Date of Patent: April 23, 1985Assignee: Imperial Chemical Industries PLCInventors: Kenneth Anderton, Nigel Hall, Brian Parton, Andrew H. M. Renfrew, Malcolm G. Shaw
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Patent number: 4472575Abstract: A dyestuff of the formula: ##STR1## wherein: the groups X.sub.1 and X.sub.2 are independently hydrogen, halogen, alkyl, alkoxy or aryl;(R).sub.n represents n substituents R each of which is independently halogen, lower alkyl, lower alkoxy or COOH and n is 0 or 1;a+b is 0 to 4;A is O, S or NR.sub.2 wherein R.sub.2 is H or optionally substituted lower alkyl;B is an optionally substituted aliphatic or optionally substituted araliphatic group;R.sub.1 is hydrogen, optionally substituted lower alkyl, optionally substituted aryl or optionally substituted aralkyl; andZ is an aromatic nitrogen ring heterocycle devoid of cellulose-reactive groups.The dyestuffs are valuable for the coloration of cellulose especially in the form of paper. The resulting colored cellulose is a bright blue with good fastness properties.Type: GrantFiled: December 23, 1982Date of Patent: September 18, 1984Assignee: Imperial Chemical Industries PLCInventor: Andrew H. M. Renfrew
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Patent number: 4391754Abstract: Compounds of the formula: ##STR1## wherein R.sup.1 is alkyl or aryl;X is H, NH.sub.2 or NHCH.sub.3 ;one of Y and Z is OH and the other is H, NH.sub.2 or NHCH.sub.3 ; andone of R.sup.2 and R.sup.3 is H and the one that is ortho to the OH group is a --CH.sub.2 R.sup.1 radical.The compounds include pleochroic dyes useful in liquid crystal display systems.Type: GrantFiled: March 29, 1982Date of Patent: July 5, 1983Assignee: Imperial Chemical Industries PLCInventor: Andrew H. M. Renfrew
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Patent number: 4182720Abstract: Process for the preparation of homogentisic lactone by reacting hydroquinone with a di(lower alkyl) chloro (or bromo) malonate and an alkali metal lower alkoxide to give an alkali metal 3-carbo(loweralkoxy)-5-hydroxy-2-oxidobenzo[b]furan which is subsequently decarboxylated by treatment with a strong mineral acid to give homogentisic lactone. The latter is readily converted into homogentisic acid by conventional means.Type: GrantFiled: July 20, 1978Date of Patent: January 8, 1980Assignee: Imperial Chemical Industries LimitedInventors: Andrew H. M. Renfrew, Stephen B. Bostock
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Patent number: 4147510Abstract: Process for the coloration of polyester or cellulose-triacetate textile materials, or polyester/cellulose unions, with disperse anthraquinone dyestuffs containing an alkoxycarbonylalkoxy group and giving a subsequent alkaline rinse.Type: GrantFiled: August 31, 1977Date of Patent: April 3, 1979Assignee: Imperial Chemical Industries LimitedInventors: Stephen B. Bostock, Andrew H. M. Renfrew, Geoffrey H. Cartwright