Granted Patent
Utility
US 6,725,922 · App. 10/194,367
Ramping well bores
Inventor:
Joseph A. Zupanick
Patented Case
View Patent ↗
Granted: Apr 27, 2004
Filed: Jul 12, 2002
Inventor
Joseph A. Zupanick
Assignee (at issue)
CDX Gas, 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.