Granted Patent
Utility
US 6,808,375 · App. 10/058,443
Expanded porous thermoplastic polymer membranes and device for the production thereof
Inventor:
Rebecca Klötzer
Patented Case
View Patent ↗
Granted: Oct 26, 2004
Filed: Jan 22, 2002
Inventor
Rebecca Klötzer
Assignee (at issue)
Sartorius AG
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.