Patents by Inventor Johannes C. A. Engels

Johannes C. A. Engels 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 continously monitoring and controlling the product film quality from a polymer production unit
    Patent number: 4442054
    Abstract: A process for continuously monitoring and controlling product film quality from a polymer production unit and for automatically separating acceptable and unacceptable polymer product includes the steps of continuously formulating a solid particulate polymer product in the polymer production unit; withdrawing a product sample and preparing a film from the product sample; analyzing the film properties; continuously delivering the product remaining after product sampling to a residence holding device; and providing a signal representative of the film analysis so as to divert acceptable product in the holding device to product storage or unacceptable product to a by-product delivery line.
    Type: Grant
    Filed: May 14, 1981
    Date of Patent: April 10, 1984
    Assignee: Stamicarbon BV
    Inventors: Lambertus M. Dane, Johannes C. A. Engels, Cornelis L. Stevens