Granted Patent
Utility
US 5,618,418 · App. 08/525,311
Dead-end membrane adsorbers
Inventors:
Wolfgang Demmer, Hans-Heinrich Horl, Dietmar Nussbaumer, Abdul Weiss
Patented Case
View Patent ↗
Granted: Apr 8, 1997
Filed: Sep 7, 1995
Inventors
Wolfgang Demmer
Hans-Heinrich Horl
Dietmar Nussbaumer
Abdul Weiss
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.