Granted Patent
Utility
US 5,580,770 · App. 08/174,587
Support containing particulate adsorbent and microorganisms for removal of pollutants
Inventor:
Louis J. DeFilippi
Patented Case
View Patent ↗
Granted: Dec 3, 1996
Filed: Dec 27, 1993
Inventor
Louis J. DeFilippi
Assignee (at issue)
AlliedSignal, Inc.
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.