Granted Patent
Utility
US 5,821,114 · App. 08/728,451
Biofilter with modular panels and method of using the same
Inventors:
Dennis Wayne Barshter, Michael Arthur Del Vecchio
Patented Case
View Patent ↗
Granted: Oct 13, 1998
Filed: Oct 10, 1996
Inventors
Dennis Wayne Barshter
Michael Arthur Del Vecchio
Assignee (at issue)
Envirogen, 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.