Granted Patent
Utility
US 5,405,812 · App. 07/977,417
Method and arrangement for purifying a carbon-containing adsorption medium
Inventor:
Hermann Bruggendick
Patented Case
View Patent ↗
Granted: Apr 11, 1995
Filed: Feb 16, 1993
Inventor
Hermann Bruggendick
Assignee (at issue)
STEAG 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.