Granted Patent
Utility
US 6,280,000 · App. 09/197,687
Method for production of gas from a coal seam using intersecting well bores
Inventor:
Joseph A. Zupanick
Patented Case
View Patent ↗
Granted: Aug 28, 2001
Filed: Nov 20, 1998
Inventor
Joseph A. Zupanick
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.