Granted Patent
Utility
US 6,706,108 · App. 10/062,119
Method for making a road base material using treated oil and gas waste material
Inventor:
David Polston
Patented Case
View Patent ↗
Granted: Mar 16, 2004
Filed: Jan 31, 2002
Inventor
David Polston
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.