Granted Patent
Utility
US 6,375,831 · App. 09/495,801
Inhibiting deposits in coke oven gas processing equipment
Inventors:
Patrick Doyle, Terrence W. Mattioli, Gary S. Thundercliffe
Patented Case
View Patent ↗
Granted: Apr 23, 2002
Filed: Feb 1, 2000
Inventors
Patrick Doyle
Terrence W. Mattioli
Gary S. Thundercliffe
Assignee (at issue)
Betzdearborn, 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.