Patents by Inventor Robert Marc Fifield

Robert Marc Fifield 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).

  • A METHOD FOR CONTINUOUSLY MANUFACTURING UHMWPE PRODUCTS
    Publication number: 20220347909
    Abstract: The present invention relates to a method for continuously manufacturing UHMWPE products comprising:—providing a counter-rotating twin-screw extruder;—feeding UHMWPE powder into a hopper of said counter-rotating twin-screw extruder;—transporting said UHMWPE powder from said hopper through said counter-rotating twin-screw extruder to an outlet of said counter-rotating twin-screw extruder;—further transporting said UHMWPE powder from said outlet of said counter-rotating twin-screw extruder to an entrance of a heat-controlled tooling system for defining the shape of UHMWPE products;—withdrawing said UHMWPE products from an outlet of said heat-controlled tooling system.
    Type: Application
    Filed: July 8, 2020
    Publication date: November 3, 2022
    Inventors: Robert Marc Fifield, Guido Terbrack
  • Process for producing high-performance polymer fibers
    Patent number: 9205589
    Abstract: The present invention relates to a process for the preparation of polymer filaments having a high tensile strength and modulus by extrusion of a solution of a solvent and linear high-molecular weight polymer and subsequent spinning and quenching of the filaments thus formed, wherein after spinning and quenching the as-spun filaments are stretched under contact with steam for removing the solvent from filaments being stretched.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: December 8, 2015
    Assignee: POLYMER RESEARCH & DEVELOPMENT
    Inventors: Pieter Jan Lemstra, Robert Marc Fifield, Altug Altay
  • PROCESS FOR PRODUCING HIGH-PERFORMANCE POLYMER FIBERS
    Publication number: 20130241105
    Abstract: The present invention relates to a process for the preparation of polymer filaments having a high tensile strength and modulus by extrusion of a solution of a solvent and linear high-molecular weight polymer and subsequent spinning and quenching of the filaments thus formed, wherein after spinning and quenching the as-spun filaments are stretched under contact with steam for removing the solvent from filaments being stretched.
    Type: Application
    Filed: October 5, 2011
    Publication date: September 19, 2013
    Applicant: POLYMER RESEARCH & DEVELOPMENT
    Inventors: Pieter Jan Lemstra, Robert Marc Fifield, Altug Altay