Granted Patent
Utility
US 5,795,751 · App. 08/719,831
Biofilter for removal of nitrogen oxides from contaminated gases under aerobic conditions
Inventor:
William A. Apel
Patented Case
View Patent ↗
Granted: Aug 18, 1998
Filed: Sep 30, 1996
Inventor
William A. Apel
Assignee (at issue)
Lockheed Martin Idaho Technologies Company
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.