Granted Patent
Utility
US 5,325,673 · App. 08/021,384
Natural gas liquefaction pretreatment process
Inventors:
Charles A. Durr, William C. Petterson
Patented Case
View Patent ↗
Granted: Jul 5, 1994
Filed: Feb 23, 1993
Inventors
Charles A. Durr
William C. Petterson
Assignee (at issue)
The M.W. Kellogg 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.