Patents by Inventor Johan VAN LEEUWEN

Johan VAN LEEUWEN 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).

  • System for processing of low viscosity polymers
    Patent number: 11077585
    Abstract: Disclosed herein is a system comprising a first pump; a pelletization system that comprises an underwater pelletizer; where the pelletization system is located downstream of the first pump and is in fluid communication with it; a direct line that is located downstream of the first pump and upstream of the pelletization system; where the direct line does not contain a pump or a heat exchanger; and a bypass line that is located downstream of the first pump and upstream of the pelletization system; where the bypass line comprises a second pump; where the first pump is operative to discharge the polymer to the pelletization system via the direct line when the polymer has a melt viscosity greater than 105 centipoise; and where the first pump is operative to discharge the polymer to the pelletization system via the bypass line when the polymer has a melt viscosity less than 105 centipoise.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: August 3, 2021
    Assignee: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Michael J. Zogg, Jr., Timothy W. Gambrel, Johan Van Leeuwen
  • SYSTEM FOR PROCESSING OF LOW VISCOSITY POLYMERS
    Publication number: 20170368716
    Abstract: Disclosed herein is a system comprising a first pump; a pelletization system that comprises an underwater pelletizer; where the pelletization system is located downstream of the first pump and is in fluid communication with it; a direct line that is located downstream of the first pump and upstream of the pelletization system; where the direct line does not contain a pump or a heat exchanger; and a bypass line that is located downstream of the first pump and upstream of the pelletization system; where the bypass line comprises a second pump; where the first pump is operative to discharge the polymer to the pelletization system via the direct line when the polymer has a melt viscosity greater than 105 centipoise; and where the first pump is operative to discharge the polymer to the pelletization system via the bypass line when the polymer has a melt viscosity less than 105 centipoise.
    Type: Application
    Filed: December 10, 2015
    Publication date: December 28, 2017
    Inventors: Michael J. ZOGG, Jr., Timothy W. GAMBREL, Johan VAN LEEUWEN