Granted Patent
Utility
US 6,805,198 · App. 10/223,118
Organic acid system for high temperature acidizing
Inventors:
Tianping Huang, Paul McElfresh, Allen D. Gabrysch
Patented Case
View Patent ↗
Granted: Oct 19, 2004
Filed: Aug 19, 2002
Inventors
Tianping Huang
Paul McElfresh
Allen D. Gabrysch
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.