Patents by Inventor Stephen William Russell

Stephen William Russell 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).

  • 1,2-bis-(4,7-dimethyl-1,4,7-triazacyclonon-1-yl)-ethane and intermediate for the synthesis of same
    Patent number: 8907082
    Abstract: The present invention provides improved processes for the synthesis of 1,4-ditosyl-1,4,7-triazacyclonone, comprising deprotecting a compound of formula (C): wherein P is tosylate or arylsulfonate, with an acidic medium to form 1,2-bis(1,4,7-triazacyclonon-1-yl)-ethane; and subsequently adding formaldehyde and formic acid to the acidic medium to form 1,2-bis-(4,7-dimethyl-1,4,7-triazacyclonon-1-yl)-ethane (Me4-DTNE). The syntheses of intermediates are also disclosed.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: December 9, 2014
    Assignee: Catexel Limited
    Inventors: Ronald Hage, Jean Hypolites Koek, Stephen William Russell, Lodewijk Van der Wolf, Jianrong Zhang, Wei Zhao, Xiaohong Wang
  • 1,2-BIS-(4,7-DIMETHYL-1,4,7-TRIAZACYCLONON-1-YL)-ETHANE AND INTERMEDIATE FOR THE SYNTHESIS OF SAME
    Publication number: 20130261297
    Abstract: The present invention provides improved processes for the synthesis of 1,4-ditosyl-1,4,7-triazacyclonone and protected analogues thereof, and to synthesise bis(triazacyclononane) ligands.
    Type: Application
    Filed: July 5, 2011
    Publication date: October 3, 2013
    Applicant: CATEXEL LIMITED
    Inventors: Ronald Hage, Jean Hypolites Koek, Stephen William Russell, Lodewijk Van der Wolf, Jianrong Zhang, Wei Zhao, Xiaohong Wang
  • Bleach catalyst and composition and method for bleaching a substrate
    Patent number: 6537959
    Abstract: Compounds are provided that may be used as ligands in transition metal complexes, in turn useful as bleach catalysts. Also provided are complexes, bleaching compositions and methods of using the compounds.
    Type: Grant
    Filed: May 8, 2001
    Date of Patent: March 25, 2003
    Assignee: Unilever Home & Personal Care USA, division of Conopco, Inc.
    Inventors: Adrianus Cornelis Appel, Ronald Hage, Stephen William Russell, David Tetard
  • Method for simulating chemical reactions
    Publication number: 20020111782
    Abstract: A process for simulating complex chemical reaction pathways, wherein the simulation is based on transformations with relative probabilities that helps predicting the outcome of processes that may involve multiple chain reactions and/or parallelism and/or feedback or feed forward loops.
    Type: Application
    Filed: July 20, 2001
    Publication date: August 15, 2002
    Applicant: Lipton, Division of Conopco, Inc.
    Inventors: Werner Klaffke, Shail Patel, Jeremy Andrew Rabone, Stephen William Russell, Johannes Theodorus Tissen
  • Process for preparing flavour compounds
    Publication number: 20020090733
    Abstract: A process for preparing components or mixtures of components that can be utilised to impart a flavour to a foodstuff. More in particular, a process for preparing flavour components involving so-called Maillard reactions, wherein at least part of the reaction conditions is determined by modelled relationships and/or a simulation of complex chemical reaction pathways.
    Type: Application
    Filed: July 20, 2001
    Publication date: July 11, 2002
    Applicant: Lipton, Division of Conopco, Inc.
    Inventors: Werner Klaffke, Shail Patel, Jeremy Andrew Rabone, Stephen William Russell, Johannes Theodorus Tissen
  • Bleach catalyst and composition and method for bleaching a substrate
    Publication number: 20020049148
    Abstract: Compounds are provided that may be used as ligands in transition metal complexes, in turn useful as bleach catalysts. Also provided are complexes, bleaching compositions and methods using the compounds. Particularly preferred are such compounds as 1,4,6-trimethyl-6-(n-(pyridin-2-ylmethyl)-N-methylamino)-1,4-diazacycloheptane which can be used in manganese, iron and cobalt transition metal complexes.
    Type: Application
    Filed: May 8, 2001
    Publication date: April 25, 2002
    Applicant: Unilever Home & Personal Care USA, Division of Conopco, Inc.
    Inventors: Adrianus Cornelis Appel, Ronald Hage, Stephen William Russell, David Tetard
  • Detergent bleaching composition comprising pentadentate ligand derivatives
    Patent number: 6165963
    Abstract: A detergent bleaching composition is provided comprising a compound inclug a specified pentadentate nitrogen-containing ligand. The compound can activate hydrogen peroxide or peroxyacids and provides favourable stain removal properties, particularly in the presence or iron, manganese or copper ions. In addition, an improved stability in alkaline aqueous environment has been obtained, in particular at the peroxy compound concentrations generally present in the fabric washing liquor.
    Type: Grant
    Filed: November 3, 1999
    Date of Patent: December 26, 2000
    Assignee: Unilever Home & Personal Care USA, division of Conopco, Inc.
    Inventors: Michel Gilbert Delroisse, Bernard Lucas Feringa, Ronald Hage, Roelant Mathijs Hermant, Robertus Everardus Kalmeijer, Jean Hypolites Koek, Christiaan Lamers, Minze Theunis Rispens, Stephen William Russell, Ronaldus Theodorus Vliet, Jane Whittaker
  • Bleach and oxidation catalyst
    Patent number: 6140294
    Abstract: A bleach and oxidation catalyst is provided comprising a catalytically ace iron, manganese or copper complex including a specified pentadentate nitrogen-containing ligand. The metal complex can activate hydrogen peroxide or peroxyacids and provides favourable stain removal properties. In addition, a considerably improved stability of these metal complex compounds in alkaline aqueous environment has been obtained, in particular at the peroxy compound concentrations generally present in the fabric washing liquor.
    Type: Grant
    Filed: November 3, 1999
    Date of Patent: October 31, 2000
    Assignee: Unilever Home & Personal Care USA, division of Conopco, Inc.
    Inventors: Michel Gilbert Delroisse, Bernard Lucas Feringa, Ronald Hage, Roelant Mathijs Hermant, Robertus Everardus Kalmeijer, Jean Hypolites Koek, Christiaan Lamers, Minze Theunis Rispens, Stephen William Russell, Ronaldus Theodorus Vliet, Jane Whittaker