Granted Patent
Utility
US 6,187,986 · App. 09/411,128
Fresh plant inventory hydrofluoric acid eduction process
Inventor:
Dan R. Schlaeppi
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Oct 4, 1999
Inventor
Dan R. Schlaeppi
Assignee (at issue)
Marathon Ashland Petroleum LLC
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.