Patents by Inventor Marten R. van Vliet

Marten R. van Vliet 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).

  • Particulate bleaching detergent compositions containing zeolite map and a stable bleach catalyst
    Patent number: 5409627
    Abstract: A particulate bleaching detergent composition, preferably having a bulk density of at least 700 g/l, comprises an organic surfactant system, a zeolite builder and a bleach system. The bleach system includes a peroxy bleach compound, and a transitional metal catalyst which comprises a source of Mn and/or Fe ions and a defined macrocyclic organic ligand. The zeolite is zeolite P having a silicon to aluminum ratio not exceeding 1.33 (zeolite MAP). The compositions show improved stability of the bleach catalyst against discoloration on storage, as compared with similar compositions containing conventional zeolite A.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: April 25, 1995
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Jelles V. Boskamp, Paul A. Chapple, Marten R. van Vliet
  • Bleach catalyst composition, manufacture and use thereof in detergent and/or bleach compositions
    Patent number: 5356554
    Abstract: Bleach catalyst composition in the form of non-friable composite granules. Each granule is free from easily oxidisable organic materials and comprises a manganese complex catalyst; optionally an inert salt and a binding agent. Detergent compositions comprising such granules have good peroxide and enzyme stability.
    Type: Grant
    Filed: November 19, 1992
    Date of Patent: October 18, 1994
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Francois Delwel, Marten R. van Vliet