Granted Patent
Utility
US 5,698,042 · App. 08/599,212
Method of cleaning furnace headers
Inventors:
Peggy L. Sims, Joseph L. Greene, John William Hoose
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: Feb 9, 1996
Inventors
Peggy L. Sims
Joseph L. Greene
John William Hoose
Assignee (at issue)
Praxair 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.