Patents by Inventor Erik Wilhelmus Maria Derksen

Erik Wilhelmus Maria Derksen 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: 5945054
    Abstract: The invention pertains to a process for manufacturing filaments from an optically anisotropic spinning solution in which the spinning solution is extruded through spinning orifices grouped in at least one spinning section and the extrudates are passed through an inert gas and a coagulation bath in succession, with the ratio of the spacing of the spinning orifices to the width of the spinning section being more than 0.15 and less than 0.7, and the width of the spinning section being less than 5 mm. The invention makes it possible to spin a plurality of filaments of good physical properties at a high speed and a comparatively high acid concentration in the coagulant without widespread sticking.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: August 31, 1999
    Assignee: Akzo Nobel N.V.
    Inventors: Johannes Jacobus Meerman, Erik Wilhelmus Maria Derksen, Peter Jeroen Cloos