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).

  • Patent number: 5560749
    Abstract: A bleaching composition and method is described that includes contacting a substrate with a peroxygen compound and a polymeric bleach precursor which has a monomer repeating unit of the structure: ##STR1## wherein R is hydrogen or a C.sub.1 -C.sub.20 radical selected from the group consisting of alkyl, cycloalkyl, alkenyl, cycloalkenyl and aryl radicals; andR.sup.1 is a C.sub.1 -C.sub.40 radical selected from the group consisting of alkyl, cycloalkyl, alkenyl, cycloalkenyl and aryl radicals.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: October 1, 1996
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Stephen A. Madison, Pamela C. Lam
  • Patent number: 5550256
    Abstract: 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.
    Type: Grant
    Filed: April 5, 1995
    Date of Patent: August 27, 1996
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Stephen A. Madison, Janet L. Coope
  • Patent number: 5482515
    Abstract: 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.
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: January 9, 1996
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Stephen A. Madison, Janet L. Coope
  • Patent number: 5478357
    Abstract: 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.
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: December 26, 1995
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Stephen A. Madison, Janet L. Coope
  • Patent number: 5476671
    Abstract: A novel pseudoceramide which has improved dispersibility in aqueous solutions and which can be produced by an economical manufacturing process. The process for producing new pseudoceramides and cosmetic compositions containing the new pseudoceramides are also disclosed.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: December 19, 1995
    Assignee: Chesebrough-Pond's USA Co., Division of Conopco, Inc.
    Inventors: Suk H. Cho, Laura J. Frew, Prem Chandar, Stephen A. Madison
  • Patent number: 5466396
    Abstract: The present invention is directed to novel compounds having the formula: ##STR1## wherein R is a C.sub.8 -C.sub.24 substituted or unsubstituted alkyl or alkenyl group;m is 1 to 3;n is 1 to 5; andx is hydrogen or a C.sub.1 to C.sub.3 hydrocarbon.The compounds are mild and good foaming compounds which can be used in both personal washing bars and liquids.
    Type: Grant
    Filed: November 19, 1993
    Date of Patent: November 14, 1995
    Assignee: Lever Brothers Company
    Inventors: Stephen A. Madison, Michael Massaro, Gail B. Rattinger, Christine Wenzel
  • Patent number: 5463115
    Abstract: 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: Grant
    Filed: July 16, 1991
    Date of Patent: October 31, 1995
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: David J. Batal, Stephen A. Madison
  • Patent number: 5442066
    Abstract: Novel bleach catalysts, a method for bleaching substrates using these catalysts and detergent compositions containing same are reported. The bleaches are of the quaternary oxaziridinium salt type. Substrates such as fabrics may be bleached in an aqueous solution containing the quaternary oxaziridinium salt.
    Type: Grant
    Filed: September 2, 1994
    Date of Patent: August 15, 1995
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Stephen A. Madison, Janet L. Coope
  • Patent number: 5429768
    Abstract: Novel bleach catalysts, a method for bleaching substrates using these catalysts and bleach compositions containing the catalysts are reported. These catalysts are magnesium salts of sulfonimines. Substrates such as fabrics and dishware may be bleached in an aqueous solution containing the magnesium sulfonimine salts and a peroxygen compound.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: July 4, 1995
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Laurence Boen, Stephen A. Madison
  • Patent number: 5410076
    Abstract: A process is reported for the preparation of bis(amidocarboxylic acid) involving the steps of:(i) charging a reactor with an acyl halide and an aminocarboxylate compound being formed from and selected from lactams and aminocarboxylic acids;(ii) slowly adding to the reaction medium an alkali at a rate to maintain a pH between 10 and 14; and(iii) recovering the bis(amidocarboxylic acid) from the reaction medium.The recovery procedure advantageously includes acidification of the reaction medium to a pH between 4.5 and 7. The preferred product of the process is N,N'-terephthaloyl-di(6-aminocaproic acid).
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: April 25, 1995
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Janet L. Coope, AnneMarie Brescia, Stephen A. Madison
  • Patent number: 5393902
    Abstract: A process is reported for the preparation of bis(amidocarboxylic acid) involving reacting an ester with an aminocarboxylate compound, the latter being formed from lactams or aminocarboxylic acids and salts thereof. The ester and aminocarboxylate compound are present in a weight ratio of about 1:1 to about 1:4, and reaction is conducted in a mono- or polyhydric alcohol solvent.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: February 28, 1995
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Janet L. Coope, AnneMarie Brescia, Michael I. Hill, Martina Santoso, Stephen A. Madison
  • Patent number: 5374738
    Abstract: A process is provided for preparing 1,2-benzisothiazole-1,1-dioxides having structure (1): ##STR1## where R is a C.sub.1 -C.sub.20 alkyl or aryl radical, the process comprising the steps of:(a) preparing a solution in an anhydrous solvent of a saccharin salt having structure (2): ##STR2## where Z.sup.+ is a metallic cation other than magnesium; and (b) reacting heterogeneously the saccharin salt with an organomagnesium reagent in a relative magnesium to saccharin salt molar ratio of 1:1.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: December 20, 1994
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Laurence Boen, David J. Batal, Stephen A. Madison
  • Patent number: 5370826
    Abstract: Novel bleach catalysts, a method for bleaching substrates using these catalysts and detergent compositions containing same are reported. The bleaches are of the quaternary oxaziridinium salt type. Substrates such as fabrics may be bleached in an aqueous solution containing the quaternary oxaziridinium salt. ##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: Grant
    Filed: November 12, 1993
    Date of Patent: December 6, 1994
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Stephen A. Madison, Janet L. Coope
  • Patent number: 5360569
    Abstract: 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: Grant
    Filed: November 12, 1993
    Date of Patent: November 1, 1994
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Stephen A. Madison, Janet L. Coope
  • Patent number: 5360568
    Abstract: 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: Grant
    Filed: November 12, 1993
    Date of Patent: November 1, 1994
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Stephen A. Madison, Janet L. Coope
  • Patent number: 5326861
    Abstract: 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: Grant
    Filed: October 21, 1992
    Date of Patent: July 5, 1994
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Stephen A. Madison, Jean H. Koek, Johan J. W. Eshuis, Ronald P. Potman
  • Patent number: 5310925
    Abstract: 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: Grant
    Filed: July 16, 1991
    Date of Patent: May 10, 1994
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: David J. Batal, Stephen A. Madison
  • Patent number: 5281361
    Abstract: 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: Grant
    Filed: May 29, 1991
    Date of Patent: January 25, 1994
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Christopher J. Adams, Stephen A. Madison, John Oakes, David W. Thornthwaite
  • Patent number: 5268003
    Abstract: 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: Grant
    Filed: March 31, 1992
    Date of Patent: December 7, 1993
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Janet L. Coope, Robert W. Humphreys, Stephen A. Madison
  • Patent number: 5106528
    Abstract: 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: Grant
    Filed: May 10, 1990
    Date of Patent: April 21, 1992
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Keith C. Francis, Stephen A. Madison, John Oakes, David W. Thornthwaite