Patents by Inventor David Malcolm Lewis
David Malcolm Lewis 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: 6869453Abstract: A reactive dye compound comprising: (a) at least one chromophore moiety; (b) at least one nitrogen-containing heterocycle; (c) a linking group to link each chromophore moiety to each nitrogen-containing heterocycle; characterised in that at least one nitrogen-containing heterocycle is substituted with at least one Y group wherein Y is a phosphonate or a borate derivative. The compounds herein have high Exhaustion Values (E), high Fixation Values (F) and high Efficiency Values (T) and show significant improvements in terms of reducing spent dyestuff in effluent, increasing dye affinity to the substrate, increasing the dye-substrate covalent bonding, increasing the ability to dye substrates at room temperature, decreasing the amount of dye that is removed during the post dyeing “soaping off process” and therefore simplifying the post dyeing “soaping off process” traditionally associated with dyeing cotton with fibre reactive dyes and reduction of staining of adjacent white fabrics.Type: GrantFiled: September 29, 2000Date of Patent: March 22, 2005Assignee: North Carolina State UniversityInventors: David Malcolm Lewis, Dong Wei He, Taher Iqbal Yousaf, Gilles Yves Marie Fernand Genain
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Publication number: 20040204571Abstract: New, highly multifunctional reactive dye compounds are provided. The number of leaving groups in the non-chromophoric part of the molecule added to the number of chromophore moieties is at least equal to 5, preferably in the range of from 5 to 12, more preferably from 5 to 6. The new reactive dye compounds preferably have at least two asymmetric bridges.Type: ApplicationFiled: June 2, 2004Publication date: October 14, 2004Inventors: Wei Dong He, Peter Jeffrey Broadbent, David Malcolm Lewis
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Patent number: 6790943Abstract: A reactive dye compound comprising: (a) at least one chromophore moiety; (b) at least one SO2C2H4 group which is attached to the chromophore moiety either directly via the sulphur atom of the SO2C2H4 group or via a linking group L; characterized in that at least one SO2C2H4 group is substituted on its terminal carbon atom with at least one Y group wherein Y is derived from a hydrated aldehyde, a hydrated ketone, a hydrated alpha-hydroxy ketone or the hydrated form of formic acid, and linked via one of its oxygen atoms to the terminal carbon of the SO2C2H4 group thereby forming a hemiacetal.Type: GrantFiled: March 27, 2002Date of Patent: September 14, 2004Assignee: North Carolina State UniversityInventors: Peter Jeffrey Broadbent, David Malcolm Lewis, Gilles Yves Marie Fernand Genain, Wei Dong He, Taher Iqbal Yousaf
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Patent number: 6736864Abstract: A reactive dye compound comprising: (a) at least one chromophore moiety; (b) at least one SO2C2H4 group which is attached to the chromphore moiety either directly via the sulphur atom of the SO2C2H4 group or via a linking group L; characterized in that at least one SO2C2H4 group is substituted on its terminal carbon atom with at least one Y group wherein Y is a phosphonate or borate derivative.Type: GrantFiled: March 27, 2002Date of Patent: May 18, 2004Assignee: North Carolina State UniversityInventors: David Malcolm Lewis, Dong Wei He, Taher Iqbal Yousaf, Gilles Yves Marie Fernand Genain
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Patent number: 6723834Abstract: A reactive dye compound comprising: (a) at least one chromophore moiety; (b) at least one nitrogen-containing heterocycle (c) a linking group to link each chromophore moiety to each nitrogen-containing heterocycle; characterized in that at least one nitrogen-containing heterocycle is substituted with at least one Y group wherein Y is derived from a hydrated aldehyde, a hydrated ketone, a hydrated alpha-hydroxy ketone, or the hydrated form of formic acid and linked via one of its oxygen atoms to the nitrogen-containing heterocycle thereby forming a hemiacetal.Type: GrantFiled: March 27, 2002Date of Patent: April 20, 2004Assignee: North Carolina State UniversityInventors: Peter Jeffrey Broadbent, Dong Wei He, David Malcolm Lewis, Gilles Yves Marie Fernand Ganain, Taher Iqbal Yousaf
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Patent number: 6716969Abstract: A reactive dye compound comprising: (a) at least one chromophore moiety (b) at last one SO2C2H4 group which is attached to the chromophore moiety either direcly via the sulphur atom of the SO2C2H4 group or a linking group L; characterized in that at least one SO2C2H4 group is substituted on its terminal carbon atom with at least one Y group wherein Y is —A(CO)R* wherein A is selected from O or S and wherin R′ contains at least one terminal nucleophilic group, such as OH, NH2, SH, COOH, N, NHR1 and NR1R2 wherein R1 and R2 may be the same of different and may be selected from C1-C4 alkyl; and salts therof. Also claimed is a process of manufacture of the compounds herein and products obtainable by the process.Type: GrantFiled: November 8, 2001Date of Patent: April 6, 2004Assignee: North Carolina State UniversityInventors: David Malcolm Lewis, Wei Dong He, Taher Iqbal Yousaf, Gilles Yves Maria Fernand Genain
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Patent number: 6713613Abstract: A reactive dye compound comprising: (a) at least one chromophore moiety (b) at least one nitrogen-containing heterocycle (c) a linking group to link each chromophore moiety to each nitrogen-containing heterocycle; characterised in that at least one nitrogen-containing heterocycle is substituted with at least one oxy- or thio-carbonyl derivative wherein the oxy- or thio-carbonyl derivative is selected from Y wherein Y is —A(CO)R* wherein A is selected from O or S and wherein R* is an organic residue which comprises at least one nucleophilic group, and salts thereof.Type: GrantFiled: November 8, 2001Date of Patent: March 30, 2004Assignee: North Carolina State UniversityInventors: David Malcolm Lewis, Wei Dong He, Taher Iqbal Yousaf, Gilles Yves Marie Fernand Genain
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Publication number: 20040055092Abstract: The invention provides a method of treatment of a material, comprising contacting said material with a percarbamic acid and/or diacyl percarbamate. Preferably the percarbamic acid has formula (I), where R represents an optionally substituted alkyl, aryl, heteroaryl, cycloalkyl or non-aromatic heterocyclic group, a hydrogen atom, or a group having formula (1a), where each R2 independently represents a hydrogen atom or an alkyl group; and m=0 to 30. The method provides effective bleaching agents and r sterilizing agents an or bacteriocidal agents over a wide range of pH and temperatures, for a wide range of applications. Compositions comprise formula (II), whereby R is H or alkyl and L is a moiety displaced by —OOH, and hydrogen peroxide or per hydroxy anion or a precursor therefor.Type: ApplicationFiled: September 6, 2003Publication date: March 25, 2004Inventors: David Malcolm Lewis, Juning Yao, Jerry S. Knapp, Jamie Anthony Hawkes
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Patent number: 6518407Abstract: A novel reactive dye compound is disclosed. It comprises (a) at least one chromophore moiety; (b) at least one nitrogen-containing heterocycle; (c) a linking group to link each chromophore moiety to each nitrogen-containing heterocycle; characterised in that at least one nitrogen-containing heterocycle is substituted with at least one thio-derivative and at least one quaternized nitrogen derivative.Type: GrantFiled: February 13, 2001Date of Patent: February 11, 2003Assignee: The Procter & Gamble CompanyInventors: Earl David Brock, David Malcolm Lewis, Taher Iqbal Yousaf
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Publication number: 20020147126Abstract: The present invention relates to compositions and a process which utilizes said compositions for providing cellulosic fabric and cellulosic fabric blends with durable press, said process comprising the steps of contacting fabric with a comprising:Type: ApplicationFiled: March 28, 2002Publication date: October 10, 2002Applicant: The Procter & Gamble CompanyInventors: Mark Robert Sivik, Bruno Albert Hubesch, An Bernaerts, David Malcolm Lewis
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Patent number: 6447554Abstract: This invention relates to reactive dye compounds, and more especially to reactive dye compounds comprising a chromophore and a nitroen-containing heterocycle comprising at least one thio-substituent. The reactive dye compounds of the present are particularly suitable for dyeing hair.Type: GrantFiled: October 2, 2000Date of Patent: September 10, 2002Assignee: The Procter & Gamble CompanyInventors: Earl David Brock, David Malcolm Lewis, Taher Iqbal Yousaf
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Patent number: 6350862Abstract: Reactive Dye compound having formula (I) wherein: D is a chromophore group; L is a linking moiety; Q is a quaternized nitrogen derivative; X and Y are independently selected from chlorine, bromine, fluorine or hydrogen; A is selected from halogen, preferably chlorine or fluorine; provided that at least one of X and Y is fluorine; A is selected from halogen, preferably chlorine or fluorine; and salts and esters thereof.Type: GrantFiled: October 2, 2000Date of Patent: February 26, 2002Assignee: The Procter & Gamble CompanyInventors: Earl David Brock, David Malcolm Lewis, Taher Iqbal Yousaf
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Patent number: 6258928Abstract: A process for improving characteristics such as, whiteness retention, degradation, and dyeability of a polyamide by contacting the polyamide with thiocyanate. A polyamide produced by the process has improved dyed color depth, dyed color uniformity, hue, elimination of light dyeing ends, protection of dye sites from degradation, protection from UV degradation, reduced yellowing or oxidation, and/or resistance to loss of dyeability.Type: GrantFiled: April 6, 2000Date of Patent: July 10, 2001Assignee: E. I. du Pont de Nemours and CompanyInventors: Bennett Ray Baird, David Malcolm Lewis, Kamleshkumar Chunilal Patel
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Patent number: 4032565Abstract: Crosslinkable polymers, suitable for use in the finishing of keratinous fibres such as wool, have polyoxyalkylene chains in which the alkylene groups consist of unbranched chains of not less than 3 carbon atoms. The polymer molecule contains at least two groupings capable of crosslinking, for example thiol, isocyanate, or thiosulphate groups, and the molecule also contains at least two carboxylic acid residues at least one of which is the residue of a polycarboxylic acid. The polyoxyalkylene chains are themselves linked at both ends to the rest of the molecule by carboxylic ester linkages. Particularly preferred compounds are water soluble and contain one or more solubilizing groups such as thiosulphate or the bi-sulphite adduct of isocyanate or, in the case of compounds with thiol groups, salt forming carboxylic groups. The compounds may be applied to textile fibres as aqueous emulsions or solutions and may be cured by drying in hot air or by steam.Type: GrantFiled: July 22, 1974Date of Patent: June 28, 1977Assignee: I.W.S. Nominee Company LimitedInventors: David John Kilpatrick, Trevor Shaw, David Malcolm Lewis
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Patent number: 3968146Abstract: Polymeric compounds containing at least one poly(oxyalkylene) chain and at least one thiosulphuric acid or thiosulphate group, and the cured products thereof, having useful application to textile fibers and to human hair. The compounds containing more than one thiosulphuric acid or thiosulphate group are curable and can be used with advantage in textile finishing, for example in the pigment dyeing and printing of fibrous materials including natural and synthetic fibers and blends thereof, in imparting shape stabilization or antistatic properties to fibers or fabrics, and for the flat setting and permanent creasing of fabrics. The compounds may be applied to hair to improve its handle and for permanent waving and setting.Type: GrantFiled: December 5, 1972Date of Patent: July 6, 1976Assignee: I.W.S. Nominee Company LimitedInventor: David Malcolm Lewis
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Patent number: 3933421Abstract: A process for the treatment of natural and/or synthetic fibrous and filamentary materials, including living human hair, which involves applying to the fibrous or filamentary materials a polymeric compound containing at least one poly (oxyalkylene) or polyamide chain and at least one thiosulphuric acid or thiosulphate group. Such compounds having more than one thiosulphuric acid or thiosulphate group are curable and can be used with advantage in textile finishing, for example in the pigment dyeing and printing of fibrous materials including pure synthetic fibres, in application to fibres or fabrics to impart shape stabilisation, in application to keratinous fabrics to impart shrink resist properties and for the flat setting and permanent creasing of fabrics, and to impart antistatic properties to fibres and filaments. Hair may be treated according to the invention to improve its handle and for permanent waving and setting.Type: GrantFiled: December 5, 1972Date of Patent: January 20, 1976Assignee: I.W.S. Nominee Company LimitedInventor: David Malcolm Lewis