Granted Patent
Utility
US 5,415,232 · App. 08/186,386
Method and apparatus for ramping of stimulation chemical concentrations for treatment of subterranean formations
Inventors:
Michael H. Johnson, Bennett M. Richard
Patented Case
View Patent ↗
Granted: May 16, 1995
Filed: Jan 21, 1994
Inventors
Michael H. Johnson
Bennett M. Richard
Assignee (at issue)
Baker Hughes Holdings 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.