Granted Patent
Utility
US 5,791,414 · App. 08/699,613
Early evaluation formation testing system
Inventors:
Neal G. Skinner, Paul D. Ringgenberg
Patented Case
View Patent ↗
Granted: Aug 11, 1998
Filed: Aug 19, 1996
Inventors
Neal G. Skinner
Paul D. Ringgenberg
Assignee (at issue)
Halliburton Energy Services, Inc.
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.