Patents by Inventor Karl Seven

Karl Seven 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).

  • Energy transfer screw and improved extrusion process
    Patent number: 11077598
    Abstract: Lower discharge temperatures and improved flow rates are obtained for the processing of meltable, solid crosslinkable compositions comprising a polymer, e.g., polyethylene, and a peroxide, in a single barrel extruder by equipping the extruder with an energy transfer (ET) screw that comprises: (1) an ET section with a distance averaged ET section depth of 8.0% to 10% of the extruder barrel internal diameter, and (2) a metering section with a metering section depth of 6.0% to 8% of the extruder barrel internal diameter.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: August 3, 2021
    Assignee: Dow Global Technologies LLC
    Inventors: Qian Gou, Mark A. Spalding, Bharat I. Chaudhary, Karl Seven
  • Energy Transfer Screw and Improved Extrusion Process
    Publication number: 20200047387
    Abstract: Lower discharge temperatures and improved flow rates are obtained for the processing of meltable, solid crosslinkable compositions comprising a polymer, e.g., polyethylene, and a peroxide, in a single barrel extruder by equipping the extruder with an energy transfer (ET) screw that comprises: (1) an ET section with a distance averaged ET section depth of 8.0% to 10% of the extruder barrel internal diameter, and (2) a metering section with a metering section depth of 6.0% to 8% of the extruder barrel internal diameter.
    Type: Application
    Filed: October 13, 2017
    Publication date: February 13, 2020
    Inventors: Qian Gou, Mark A. Spalding, Bharat I. Chaudhary, Karl Seven