Granted Patent
Utility
US 6,547,489 · App. 09/794,364
Process for the removal of pollutants from the soil
Inventor:
Martin W. J. Plum
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: Feb 28, 2001
Inventor
Martin W. J. Plum
Assignee (at issue)
DSM N.V.
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.