Granted Patent
Utility
US 5,938,422 · App. 08/840,326
Removal of noxious substances from gas streams
Inventors:
James Robert Smith, Andrew James Seeley
Patented Case
View Patent ↗
Granted: Aug 17, 1999
Filed: Apr 16, 1997
Inventors
James Robert Smith
Andrew James Seeley
Assignee (at issue)
The BOC Group plc
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.