Patents by Inventor Stephen A. Madison
Stephen A. Madison 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: 5360569Abstract: A bleaching composition is described that includes a peroxygen compound such as sodium perborate, an oxygen transfer agent in the form of a quaternary imine salt and a bleach precursor. The quaternary imine salt at relatively low concentrations enhances the activity of the precursor. A method for bleaching substrates is also provided, especially a method for cleaning fabrics. The preferred quaternary imine salt has the structure: ##STR1## wherein: R.sup.4 may be a substituted or unsubstituted radical selected from the group consisting of hydrogen, aryl, heterocyclic ring, alkyl and cycloalkyl radicals;R.sup.5 and R.sup.6 may be a substituted or unsubstituted radical selected from the group consisting of hydrogen, aryl, heterocyclic ring, alkyl, cycloalkyl, nitro, halo, cyano, alkoxy, keto, carboxylic and carboalkoxy radicals; andX.sup.- is a counterion stable in the presence of oxidizing agents.Type: GrantFiled: November 12, 1993Date of Patent: November 1, 1994Assignee: Lever Brothers Company, Division of Conopco, Inc.Inventors: Stephen A. Madison, Janet L. Coope
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Patent number: 5360568Abstract: Novel bleach catalysts, a method for bleaching substrates using these catalysts and detergent compositions containing the catalysts are reported. The catalysts are quaternary imine salts. Substrates such as fabrics may be bleached in an aqueous solution containing these salts and a peroxygen compound. Most preferred as catalyst are the 3,4-dihydroquinolinium salts having the structure: ##STR1## wherein: R.sup.4 may be a substituted or unsubstituted radical selected from the group consisting of hydrogen, aryl, heterocyclic ring, alkyl and cycloalkyl radicals;R.sup.5 and R.sup.6 may be a substituted or unsubstituted radical selected from the group consisting of hydrogen, aryl, heterocyclic ring, alkyl, cycloalkyl, nitro, halo, cyano, alkoxy, keto, carboxylic and carboalkoxy radicals; andX.sup.- is a counterion stable in the presence of oxidizing agents.Type: GrantFiled: November 12, 1993Date of Patent: November 1, 1994Assignee: Lever Brothers Company, Division of Conopco, Inc.Inventors: Stephen A. Madison, Janet L. Coope
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Patent number: 5326861Abstract: An improved process for preparing triazacyclo compounds and, in particular, 1,4,7-tritosyl-1,4,7-triazyacyclononane. The process involves reacting a diethylenetriamine triarylsulphonate with a cyclising agent selected from the group consisting of diaryl sulphonates, dialkyl sulphonates, ethylene dibromide, ethylene dichloride and diacetylglycol in the presence of ultrasound.Type: GrantFiled: October 21, 1992Date of Patent: July 5, 1994Assignee: Lever Brothers Company, Division of Conopco, Inc.Inventors: Stephen A. Madison, Jean H. Koek, Johan J. W. Eshuis, Ronald P. Potman
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Patent number: 5310925Abstract: Novel bleaches are reported. The bleaches are of the N-sulfonyloxaziridine type. Substrates such as fabrics may be bleached in an aqueous solution containing the oxaziridine.Type: GrantFiled: July 16, 1991Date of Patent: May 10, 1994Assignee: Lever Brothers Company, Division of Conopco, Inc.Inventors: David J. Batal, Stephen A. Madison
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Patent number: 5281361Abstract: Novel cationic nitriles, methods of preparing such nitriles and use thereof as cationic peroxyacid bleach precursor in bleaching (detergent) compositions are disclosed.The novel cationic nitriles are non-hygroscopic and are characterized in that they have a counter-anion X.sup.- selected from the group consisting of 1) R-SO.sub.3.sup.-, 2) R-SO.sub.4.sup.-, 3) R-CO.sub.2.sup.-, wherein R is a straight or branched chain, optionally substituted, alkyl, alkylether or alkylene group containing 4 to 20 carbon atoms, or a phenyl or alkyl phenyl group containing 6 to 20 carbon atoms, and 4) any other surfactant anion not falling under the groups 1), 2) and 3).Type: GrantFiled: May 29, 1991Date of Patent: January 25, 1994Assignee: Lever Brothers Company, Division of Conopco, Inc.Inventors: Christopher J. Adams, Stephen A. Madison, John Oakes, David W. Thornthwaite
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Patent number: 5268003Abstract: An amido peroxyacid compound is provided having the formula: ##STR1## wherein R is selected from the group consisting of C.sub.1 -C.sub.12 alkylene, C.sub.5 -C.sub.12 cycloalkylene, C.sub.6 -C.sub.12 arylene and radical combinations thereof;R.sup.1 and R.sup.2 are independently selected from the group consisting of H, C.sub.1 -C.sub.16 alkyl and C.sub.6 -C.sub.12 aryl radicals and a radical that can form a C.sub.3 -C.sub.12 ring together with R.sup.3 and both nitrogens;R.sup.3 is selected from the group consisting of C.sub.1 -C.sub.12 alkylene, C.sub.5 -C.sub.12 cycloalkylene and C.sub.6 -C.sub.12 arylene radicals, and provided when R.sup.3 is arylene and when n' and m' are each zero, R is other than C.sub.5 alkylene;n and n' each are an integer chosen such that the sum thereof is 1;m and m' each are an integer chosen such that the sum thereof is 1; andM is selected from the group consisting of H, alkali metal, alkaline earth metal, ammonium, alkanolammonium cations and radicals and combinations thereof.Type: GrantFiled: March 31, 1992Date of Patent: December 7, 1993Assignee: Lever Brothers Company, Division of Conopco, Inc.Inventors: Janet L. Coope, Robert W. Humphreys, Stephen A. Madison
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Patent number: 5232633Abstract: Carbonated isethionate surfactants, compositions containing them and methods for their preparation are disclosed.Type: GrantFiled: June 19, 1992Date of Patent: August 3, 1993Assignee: Lever BrothersInventors: Leonora M. Ilardi, Stephen Madison, Deanne Oppermann
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Patent number: 5106528Abstract: Bleaching and detergent compositions are disclosed which upon dissolution in aqueous medium provide a mixture of hydrophobic and cationic peroxyacids. The compositions which are highly effective at removing a wide range of stain types with better background whiteness at bleach solution temperatures of 40.degree. C. and less, comprise a peroxide bleach compound, a hydrophobic peroxyacid (bleach precursor) and a cationic or amphoteric peroxyacid (bleach precursor).Type: GrantFiled: May 10, 1990Date of Patent: April 21, 1992Assignee: Lever Brothers Company, Division of Conopco, Inc.Inventors: Keith C. Francis, Stephen A. Madison, John Oakes, David W. Thornthwaite
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Patent number: 5078907Abstract: A bleach precursor compound, its peroxygen derivative, and detergent compositions containing these materials are disclosed herein. The bleach precursors structurally comprise a pair of different diesters, one ester containing an electrically-charged functional group. Perhydrolysis of the precursor in the presence of hydrogen peroxide and a basic aqueous media generates a peroxycarboxylic acid.Type: GrantFiled: November 1, 1989Date of Patent: January 7, 1992Assignee: Lever Brothers Company, division of Conopco, Inc.Inventors: Stephen A. Madison, Pamela C. Lam
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Patent number: 5047163Abstract: A bleaching composition is described that includes a peroxygen compound such as sodium perborate, an oxygen transfer agent such as a sulfonimine, and a bleach precursor such as TAED. These sulfonimines at relatively low concentrations enhance the activity of the precursor. A method for bleaching substrates is also provided, especially a method for cleaning fabrics.Type: GrantFiled: March 16, 1990Date of Patent: September 10, 1991Assignee: Lever Brothers Company, Division of Conopco, Inc.Inventors: David J. Batal, Stephen A. Madison
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Patent number: 5045223Abstract: Novel bleaches, a method for bleaching substrates using these materials and detergent compositions containing same are reported. The bleaches are of the N-sulfonyloxaziridine type. Substrates such as fabrics may be bleached in an aqueous solution containing the oxaziridine.Type: GrantFiled: March 16, 1990Date of Patent: September 3, 1991Assignee: Lever Brothers Company, division of Conopco, Inc.Inventors: David J. Batal, Stephen A. Madison
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Patent number: 5041232Abstract: Novel bleach catalysts, a method for bleaching substrates using these catalysts and detergent compositions containing the catalysts are reported. The catalysts are sulfonimines. Substrates such as fabrics may be bleached in an aqueous solution containing the sulfonimine and a peroxygen compound.Type: GrantFiled: March 16, 1990Date of Patent: August 20, 1991Assignee: Lever Brothers Company, division of Conopco, Inc.Inventors: David J. Batal, Stephen A. Madison
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Patent number: 4988817Abstract: A process is provided for obtaining quaternary ammonium or phosphonium substituted carbonic acid esters. The first step involves reacting the hydroxyl predecessor compound of the ester with phosgene in an aprotic organic solvent to obtain a solution of chloroformate/hydrogen chloride complex. In a second step, the chloroformate/hydrogen chloride complex in solution is admixed with a salt whose conjugate anion, normally a phenol sulfonate, has structure L. During the admixing step, pH is maintained no lower than 6 until all reactants have been combined to form the product ester. Thereupon, pH is lowered to less than 5.5 to stabilize product against hydrolysis.Type: GrantFiled: November 16, 1988Date of Patent: January 29, 1991Assignee: Lever Brothers Company, Division of Conopco, Inc.Inventors: Stephen A. Madison, Jeffrey Bonn, Eddie N. Gutierrez
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Patent number: 4985561Abstract: A process is described for obtaining sulfophenyl quaternary ammonium or phosphonium substituted carbonic acid esters. These esters are prepared through sulfonation with sulfur trioxide of aromatic chloroformates followed by reaction of the sulfonated aromatic chloroformate with quaternary ammonium or phosphonium substituted alcohols. The resultant sulfophenyl esters are useful as bleach precursors in combination with peroxygen compounds such as sodium perborate or percarbonate.Type: GrantFiled: August 29, 1989Date of Patent: January 15, 1991Assignee: Lever Brothers Company, Division of Conopco, Inc.Inventors: Stephen A. Madison, Leonora M. Ilardi, Hans Cerfontain
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Patent number: 4931563Abstract: A process is provided for obtaining sulfophenyl quarternary ammonium or phosphonium substituted carbonic acid esters. The important step in this process involves reacting a phenyl quaternary ammonium or phosphonium substituted carbonic ester with oleum that contains from 0.5 to 33% sulfur trioxide. Amounts in excess of 33% sulfur trioxide lead to increased reaction times and, eventually, unacceptable product conversons.Type: GrantFiled: November 16, 1988Date of Patent: June 5, 1990Assignee: Lever Brothers CompanyInventors: Stephen A. Madison, Leonora M. Ilardi
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Patent number: 4822510Abstract: An aqueous liquid bleaching composition is described having a pH from 1 to 6.5 and comprising 4,4'-sulfonylbisperoxybenzoic acid stably suspended by a surfactant system.Type: GrantFiled: March 25, 1988Date of Patent: April 18, 1989Assignee: Lever Brothers CompanyInventors: Stephen A. Madison, Leonora M. Ilardi, Patricia Liberati, Joshua Schwarz
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Patent number: 4818426Abstract: A bleach precursor compound, its peroxygen acid derivative, and detergent compositions containing these materials are disclosed herein. The bleach precursor structurally comprises a quaternized ammonium or phosphonium group linked to a carbonate moiety having a leaving group. Upon perhydrolysis in the presence of hydrogen peroxide and a basic aqueous media, there is generated a peroxycarbonic acid bleach.Type: GrantFiled: March 30, 1988Date of Patent: April 4, 1989Assignee: Lever Brothers CompanyInventors: Robert W. R. Humphreys, Stephen A. Madison
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Patent number: 4788316Abstract: A process for preparing sulphonated aromatic esters of the group consisting of substituted or unsubstituted sulphonato-phenyl carboxylates and sulphonato-phenyl carbonates is disclosed, comprising the steps of:(1) preparing the unsulphonated aromatic ester;(2) sulphonating said unsulphonated aromatic ester; and(3) neutralizing the acid-sulphonated aromatic ester in a non-aqueous organic solvent with an alkali metal, earth alkali metal or ammonium carboxylate in an amount in excess over the amount needed to neutralize the sulphonic acid group(s) and any free or complexed SO.sub.3 present in the product mixture from the sulphonation reaction.Preferred neutralizing agent is sodium acetate; preferred solvents are acetic acid or glyme and diglyme.Type: GrantFiled: December 16, 1986Date of Patent: November 29, 1988Assignee: Lever Brothers CompanyInventors: David W. Thornthwaite, David W. Roberts, Stephen A. Madison
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Patent number: 4751015Abstract: A bleach precursor compound, its peroxygen acid derivative, and detergent compositions containing these materials are disclosed herein. The bleach precursor structurally comprises a quaternized ammonium or phosphonium group linked to a carbonate moiety having a leaving group. Upon perhydrolysis in the presence of hydrogen peroxide and a basic aqueous media, there is generated a peroxycarbonic acid bleach.Type: GrantFiled: March 17, 1987Date of Patent: June 14, 1988Assignee: Lever Brothers CompanyInventors: Robert W. Humphreys, Stephen A. Madison