Granted Patent
Utility
US 5,215,692 · App. 07/829,024
Process for the surface grafting of formed bodies, in particulate also microporous membranes made from nitrogen-containing polymers
Inventors:
Hans-Heinrich Horl, Dietmar Nussbaumer, Eberhard Wunn
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: May 1, 1992
Inventors
Hans-Heinrich Horl
Dietmar Nussbaumer
Eberhard Wunn
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.