Patents by Inventor Jan Wiebe J. W. Van Der Werf

Jan Wiebe J. W. Van Der Werf 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).

  • Process for the production of urea-comprising particles
    Patent number: 7700012
    Abstract: Process for the production of urea-comprising particles, wherein the urea-comprising particles are produced in a pelletizer, comprising a feeding device, a belt and a device to remove the formed pellets from the belt, by feeding a urea-comprising liquid to the feeding device from which droplets of the urea-comprising liquid are dosed to the belt, whereon the urea-comprising droplets solidify and cool to a temperature of ?55° C., whereafter the formed urea-comprising particles are removed from the belt.
    Type: Grant
    Filed: April 3, 2006
    Date of Patent: April 20, 2010
    Assignee: DSM IP Assets B.V.
    Inventors: Jan Wiebe J. W. Van Der Werf, Marc Jozeph M. J. Brouwer