Patents by Inventor Friedrich Wilhelm Ludwig Paul Vollrath

Friedrich Wilhelm Ludwig Paul Vollrath 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).

  • Apparatus and method for forming materials
    Patent number: 6858168
    Abstract: An apparatus and method for forming liquid spinning solution into a solid formed product whereby the solution is passed through at least one tubular passage (17) having walls formed at least partly of semipermeable and/or porous material. The semipermeable and/or porous material allows parameters, such as the concentration of hydrogen ions, water, salts and low molecular weight, of the liquid spinning solution to be altered as the spinning solution passes through the tubular passage(s).
    Type: Grant
    Filed: November 24, 2000
    Date of Patent: February 22, 2005
    Assignee: Spin'Tech Engineering GmbH
    Inventors: Friedrich Wilhelm Ludwig Paul Vollrath, David Philip Knight
  • Apparatus and method for forming materials
    Publication number: 20030201560
    Abstract: An apparatus and method for forming liquid spinning solution into a solid formed product. The liquid spinning solution is passed through a die assembly having a tubular passage having walls formed partly of semipermeable and/or porous material. In operation, draw down of the liquid spinning solution is performed partly within the die assembly. The semipermeable and/or porous material allows parameters, such as the concentration of hydrogen ions, water, salts and low molecular weight constituents, of the spinning solution to be altered as the spinning solution passes through the tubular passage.
    Type: Application
    Filed: May 6, 2003
    Publication date: October 30, 2003
    Inventors: Friedrich Wilhelm Ludwig Paul Vollrath, David Philip Knight