Patents by Inventor Petra Welzel

Petra Welzel 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).

  • Bioactive Hydrogel
    Publication number: 20140377330
    Abstract: The invention relates to a bioactive hydrogel as a hybrid material of heparin and star-branched polyethylene glycol with functionalized end groups, wherein the heparin is bound directly by reaction of the carboxyl groups activated with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimides/N-hydroxysulfosuccinimide (EDC/s-NHS) with the terminal amino groups of the polyethylene glycol covalently by amide bonds.
    Type: Application
    Filed: September 8, 2014
    Publication date: December 25, 2014
    Inventors: Carsten Werner, Uwe Freudenberg, Dorit Meinhold, Marie-Francoise Gouzy, Petra Welzel
  • Bioactive hydrogel
    Patent number: 8859706
    Abstract: The invention relates to a bioactive hydrogel as a hybrid material of heparin and star-branched polyethylene glycol with functionalized end groups, wherein the heparin is bound directly by reaction of the carboxyl groups activated with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimides/N-hydroxysulfosuccinimide (EDC/s-NHS) with the terminal amino groups of the polyethylene glycol covalently by amide bonds.
    Type: Grant
    Filed: November 28, 2008
    Date of Patent: October 14, 2014
    Assignee: Zetascience GmbH
    Inventors: Carsten Werner, Uwe Freudenberg, Dorit Meinhold, Marie-Francoise Gouzy, Petra Welzel
  • Bioactive Hydrogel
    Publication number: 20120058943
    Abstract: The invention relates to a bioactive hydrogel as a hybrid material of heparin and star-branched polyethylene glycol with functionalized end groups, wherein the heparin is bound directly by reaction of the carboxyl groups activated with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimides/N-hydroxysulfosuccinimide (EDC/s-NHS) with the terminal amino groups of the polyethylene glycol covalently by amide bonds.
    Type: Application
    Filed: November 28, 2008
    Publication date: March 8, 2012
    Applicant: ZETASCIENCE GMBH
    Inventors: Carsten Werner, Uwe Freudenberg, Dorit Meinhold, Marie-Francoise Gouzy, Petra Welzel