Granted Patent
Utility
US 4,658,902 · App. 06/752,884
Surging fluids downhole in an earth borehole
Inventors:
David S. Wesson, A. Glen Edwards, Flint R. George, Kevin R. George, Emmert F. Brieger
Patented Case
View Patent ↗
Granted: Apr 21, 1987
Filed: Jul 8, 1985
Inventors
David S. Wesson
A. Glen Edwards
Flint R. George
Kevin R. George
Emmert F. Brieger
Assignee (at issue)
Halliburton
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.