Granted Patent
Utility
US 5,911,278 · App. 08/880,011
Calliope oil production system
Inventor:
Donald D. Reitz
Patented Case
View Patent ↗
Granted: Jun 15, 1999
Filed: Jun 20, 1997
Inventor
Donald D. Reitz
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.