Granted Patent
Utility
US 5,996,726 · App. 09/015,457
System and method for determining the distribution and orientation of natural fractures
Inventors:
Gordon G. Sorrells, Norman R. Warpinski
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: Jan 29, 1998
Inventors
Gordon G. Sorrells
Norman R. Warpinski
Assignee (at issue)
Gas Research Institute
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.