Granted Patent
Utility
US 5,089,153 · App. 07/494,673
Method of inhibiting corrosion in acidizing wells
Inventors:
Dennis A. Williams, Phyllis K. Holifield, James R. Looney, Lee A. McDougall
Patented Case
View Patent ↗
Granted: Feb 18, 1992
Filed: Mar 16, 1990
Inventors
Dennis A. Williams
Phyllis K. Holifield
James R. Looney
Lee A. McDougall
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.