Granted Patent
Utility
US 6,239,261 · App. 08/253,232
Pasteurized, purified von Willebrand factor concentrate and a process for the preparation thereof
Inventors:
Norbert Heimburger, Gerhard Kumpe, Klaus Wellner
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Jun 2, 1994
Inventors
Norbert Heimburger
Gerhard Kumpe
Klaus Wellner
Assignee (at issue)
Aventis Behring GmbH
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.