Patents by Inventor Adrianus Cornelis Appel

Adrianus Cornelis Appel 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).

  • Preserved enhancement of bleaching catalysts
    Publication number: 20030232733
    Abstract: The present invention provides a catalytic bleaching system that is low in surfactant alkyl hydroperoxide and comprises an antioxidant.
    Type: Application
    Filed: June 4, 2003
    Publication date: December 18, 2003
    Applicant: Unilever Home & Personal Care USA, Division of Conopco, Inc.
    Inventors: Adrianus Cornelis Appel, Ronald Hage, Roelant Mathijs Hermant, Joachim Lienke, Simon Marinus Veerman
  • Enhancement of bleaching catalysts
    Publication number: 20030228994
    Abstract: The present invention provides a catalytic bleaching system that is low in surfactant alkyl hydroperoxide content.
    Type: Application
    Filed: June 5, 2003
    Publication date: December 11, 2003
    Applicant: Unilever Home & Personal Care USA, Division of Conopco, Inc.
    Inventors: Adrianus Cornelis Appel, Ronald Hage, Roelant Mathijs Hermant, Christiaan Lamers, Joachim Lienke
  • 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
  • Ligand and complex for catalytically bleaching a substrate
    Patent number: 6432900
    Abstract: The invention relates to ligands or complexes useful as catalysts for catalytically bleaching substrates with atmospheric oxygen, and as catalysts in the of treatment of textiles such as laundry fabrics whereby bleaching by atmospheric oxygen is catalysed after the treatment. The ligand is of the general formula: wherein R1, R2, and R3 independently represent a group selected from hydrogen, hydroxyl, halogen, —NH—C(NH)NH2, —R and —OR, wherein R=alkyl, alkenyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl or a carbonyl derivative group, R being optionally substituted by one or more functional groups, and provided that two of R1, R2 and R3 are coordinating groups and one of R1, R2 and R3 is a non-coordinating group; Q independently represents a group selected from C2-3-alkylene optionally substituted by H, benzyl or C1-8-alkyl; and Q1, Q2 and Q3 independently represent specified linking groups.
    Type: Grant
    Filed: August 29, 2000
    Date of Patent: August 13, 2002
    Assignee: Unilever Home & Personal Care USA, Division of Conopco, Inc.
    Inventors: Adrianus Cornelis Appel, Ronald Hage, David Tetard, Robin Stefan Twisker
  • 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