Granted Patent
Utility
US 6,673,239 · App. 09/747,710
Hydrocarbon purificatin system regeneration
Inventors:
Marvin M. Johnson, Bruce B. Randolph
Patented Case
View Patent ↗
Granted: Jan 6, 2004
Filed: Dec 21, 2000
Inventors
Marvin M. Johnson
Bruce B. Randolph
Assignee (at issue)
ConocoPhillips Company
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.