Granted Patent
Utility
US 5,447,621 · App. 08/187,923
Integrated process for upgrading middle distillate production
Inventor:
Michael Glenn Hunter
Patented Case
View Patent ↗
Granted: Sep 5, 1995
Filed: Jan 27, 1994
Inventor
Michael Glenn Hunter
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.