Patents by Inventor Gerd Wolz

Gerd Wolz 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).

  • Method for recycling polyesters or polyester mixtures from polyester-containing waste
    Patent number: 7935736
    Abstract: The invention relates to a method for recycling polyesters or polyester mixtures from polyester-containing waste, in which the polyester or the polyester mixture is dissolved in a solvent and subsequently free-flowing particles are precipitated herefrom with a precipitant. The precipitant is thereby chosen such that subsequent separation of precipitant and solvent is made possible in a simple manner.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: May 3, 2011
    Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
    Inventors: Andreas Mäurer, Udo Knauf, Gerd Wolz, Michael Frankl, Otto Beck
  • Method for Recycling Polyesters or Polyester Mixtures from Polyester-Containing Waste
    Publication number: 20070265361
    Abstract: The invention relates to a method for recycling polyesters or polyester mixtures from polyester-containing waste, in which the polyester or the polyester mixture is dissolved in a solvent and subsequently free-flowing particles are precipitated herefrom with a precipitant. The precipitant is thereby chosen such that subsequent separation of precipitant and solvent is made possible in a simple manner.
    Type: Application
    Filed: April 13, 2005
    Publication date: November 15, 2007
    Applicant: Fraunhofer-Gesellschaft zur Forderung Der Angewand
    Inventors: Andreas Maurer, Udo Knauf, Gerd Wolz, Michael Frankl, Otto Beck
  • Method for separating and recovering target polymers and their additives from a material containing polymers
    Publication number: 20040229965
    Abstract: The invention relates to a method for separating target polymers and their additives from a material containing polymers, as a result of which the recovery both of the target polymers and of the additives is made possible. Based on the principle of a selective precipitation, the target polymer is precipitated and subsequently separated from the additives present in solution and dissolved foreign polymers. The separation of the additives from the solution is effected in a further step.
    Type: Application
    Filed: February 25, 2004
    Publication date: November 18, 2004
    Inventors: Andreas Maurer, Gerd Wolz, Martin Schlummer, Thomas Luck, Udo Knauf, Rolf Kippenhahn
  • Method for separating and recovering target polymers and their additives from a material containing polymers
    Publication number: 20030191202
    Abstract: The invention relates to a method for separating target polymers and their additives from a material containing polymers, as a result of which the recovery both of the target polymers and of the additives is made possible. Based on the principle of a selective precipitation, the target polymer is precipitated and subsequently separated from the additives present in solution and dissolved foreign polymers. The separation of the additives from the solution is effected in a further step.
    Type: Application
    Filed: May 22, 2003
    Publication date: October 9, 2003
    Inventors: Andreas Maurer, Gerd Wolz, Martin Schlummer, Thomas Luck, Udo Knauf, Rolf Kippenhahn