Patents by Inventor Josephus C. Schroijen

Josephus C. Schroijen 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 preparation of melamine from urea
    Patent number: 5350849
    Abstract: The invention relates to a selective removal of impurities from the gas stream leaving a melamine synthesis reactor in the preparation of melamine from urea by means of a treatment with steam at elevated temperature in the presence of a catalyst which is shape-selective. For instance a molecular sieve is chosen.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: September 27, 1994
    Assignee: DSM N.V.
    Inventors: Cornelis G. M. van de Moesdijk, Hendrik J. Janssen, Josephus C. Schroijen