Patents by Inventor Marcel van der Helm

Marcel van der Helm 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).

  • Enzymatic bleach composition
    Patent number: 6107264
    Abstract: There is provided an enzymatic bleach composition comprising one or more surfactants and an enzyme of extracellular origin, capable of oxidizing substrates by the build-in of one or more oxygen atoms into the substrate using molecular oxygen, in particular a dioxygenase from extracellular origin, and a process for bleaching stains present on fabrics comprising treating the stained fabrics with said composition.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: August 22, 2000
    Assignee: Lever Brothers Company, division of Conopco, Inc.
    Inventors: Marcel van der Helm, Monique van der Heiden, Dirk Herman Hondmann, Annelies Smits, Ton Swarthoff, Cornelis Theodorus Verrips