Granted Patent
Utility
US 4,838,983 · App. 07/169,621
Gas treatment apparatus and method
Inventors:
Norman E. Schumaker, Richard A. Stall, Craig R. Nelson, Wilfried Wagner
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Mar 18, 1988
Inventors
Norman E. Schumaker
Richard A. Stall
Craig R. Nelson
Wilfried Wagner
Assignee (at issue)
EMCORE CORPORATION
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.