Patents by Inventor Roger Alfons Camille Antonus

Roger Alfons Camille Antonus 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 granules
    Patent number: 5653781
    Abstract: A process for the production of urea granules from a melt or solution of urea by spraying the urea melt or solution, which also contains as granulation additive formaldehyde, methylolureum, urea-formaldehyde precondensates, or hexamethylenetetramine, in the form of very fine droplets into a fluidized bed of urea particles, in which process the granulation additive is added to the melt or solution prior to the granulation at such a stage so that the mixture of the granulation additive and the urea melt or solution has a contact time of at least 20 sec., but not more than 20 min.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: August 5, 1997
    Assignee: Hydro Agri Sluiskil B.V.
    Inventors: Andre Firmin Kayaert, Roger Alfons Camille Antonus