Patents by Inventor Willy Henri P. Van Hijfte

Willy Henri P. Van Hijfte 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 treating urea bodies
    Patent number: 4160782
    Abstract: Urea bodies, such as crystals, prills, pellets and the like, with a reduced caking tendency are obtained by processing such bodies or a concentrated urea solution or melt produced in the urea synthesis, which is processed to form such bodies, with an aqueous solution containing an effective amount of dimethylol urea and/or trimethylol urea, which solution contains about 2 to about 5 mols bonded and free formaldehyde per mol of urea.
    Type: Grant
    Filed: January 9, 1978
    Date of Patent: July 10, 1979
    Assignee: Compagnie Neerlandaise de l'Azote
    Inventors: Willy Henri P. Van Hijfte, Rafael Arsene J. Goethals