Patents by Inventor Primo Pastormerlo

Primo Pastormerlo 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).

  • Treatment of urea solutions
    Patent number: 4308234
    Abstract: A device for treating urea solutions coming from synthesis reactors and containing in addition to the formed urea also free ammonia, water and unreacted ammonium carbamate having two steps wherein in the first step, a substantial amount of ammonia is distilled while ammonium carbamate is only partially decomposed, and in the second step, the bulk of carbamate is decomposed and the residual ammonia is distilled.
    Type: Grant
    Filed: November 26, 1980
    Date of Patent: December 29, 1981
    Assignee: Stamicarbon, B.V.
    Inventor: Primo Pastormerlo
  • Treatment of urea solutions
    Patent number: 4269997
    Abstract: A process and a device for treating urea solutions coming from synthesis reactors and containing in addition to the formed urea also free ammonia, water and unreacted ammonium carbammate having two steps wherein in the first step, a substantial amount of ammonia is distilled while ammonium carbammate is only partially decomposed, and in the second step, the bulk of carbammate is decomposed and the residual ammonia is distilled.
    Type: Grant
    Filed: July 11, 1979
    Date of Patent: May 26, 1981
    Assignee: Stamicarbon B.V.
    Inventor: Primo Pastormerlo