Patents by Inventor Harry Westfahl, Jr.

Harry Westfahl, Jr. 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).

  • Patent number: 11021811
    Abstract: The present invention provides a continuous method for the production of at least one polymeric yarn comprising the steps of: mixing a polymer with a first solvent generating a mixture; homogenizing the mixture; rendering the mixture inert; dosing the mixture to an extruder; immersing the mixture in a quenching bath (30), wherein an air gap is maintained before the mixture achieves the surface of the liquid of the quenching bath (30) forming at least one polymeric yarn; drawing at least once the at least one polymeric yarn; washing the polymeric yarn with a second solvent that is more volatile than the first solvent; heating the at least one polymeric yarn; drawing at room temperature, at least once, the at least one polymeric yarn; and heat drawing, at least once, the at least one polymeric yarn, wherein the mixture comprises: a polymer comprising ultra-high molecular weight polyethylene, comprising an intrinsic viscosity of from 5 dL/g to 40 dL/g, and a polydispersity index of from 2 to 10; and a first solv
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: June 1, 2021
    Assignee: Braskem S.A.
    Inventors: Marcos Roberto Paulino Bueno, Alessandro Bernardi, Harry Westfahl, Jr.