Patents by Inventor Marco Waas

Marco Waas 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).

  • Detergent compositions and process for preparing them
    Patent number: 5160657
    Abstract: In a process for preparing a granular detergent composition or component having a bulk density of at least 650 g/l, which comprises the steps of treating a particulate starting material(i) in a first step in a high-speed mixer/densifier, the mean residence time being from about 5-30 seconds;(ii) in a second step in a moderate-speed granulator/densifier, whereby it is brought into, or maintained in, a deformable state, the mean residence time being from about 1-10 minutes and(iii) in a final step in drying and/or cooling apparatus,the amount of oversize particles can be effectively reduced by adding 0.1 to 40% by weight of a powder in the second step or between the first and the second step. Preferably, the deformable state is induced in the first step.
    Type: Grant
    Filed: March 19, 1990
    Date of Patent: November 3, 1992
    Assignee: Lever Brothers Company, Division of Conopo, Inc.
    Inventors: Fabrizio Bortolotti, Luciano Pietrantoni, Petrus L. J. Swinkels, Marco Waas
  • Process for preparing a high bulk density granular detergent composition
    Patent number: 5133924
    Abstract: A granular detergent composition or component having a bulk density of at least 650 g/l can be prepared by treating a particulate starting material(i) in a first step in a high-speed mixer/densifier, the mean residence time being from about 5-30 seconds;(ii) in a second step in a moderate-speed granulator/densifier, whereby it is brought into, or maintained in, a deformable state, the mean residence time being from about 1-10 minutes and(iii) in a final step in drying and/or cooling apparatus.Preferably, the deformable state is induced in the first step.
    Type: Grant
    Filed: November 2, 1989
    Date of Patent: July 28, 1992
    Assignee: Lever Brothers Company
    Inventors: Peter W. Appel, Petrus L. J. Swinkels, Marco Waas