Granted Patent
Utility
US 5,814,118 · App. 08/751,752
HEPA filter for venting chambers
Inventors:
Terry J. Wickland, Craig Washburn
Patented Case
View Patent ↗
Granted: Sep 29, 1998
Filed: Nov 18, 1996
Inventors
Terry J. Wickland
Craig Washburn
Assignee (at issue)
NUCLEAR FILTER TECHNOLOGY, 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.