Granted Patent
Utility
US 4,442,014 · App. 06/344,606
Use of esters of sulfonic acids as anti-sludge agents during the acidizing of formations containing sludging crude oils
Inventors:
James R. Looney, Lee A. McDougall
Patented Case
View Patent ↗
Granted: Apr 10, 1984
Filed: Feb 1, 1982
Inventors
James R. Looney
Lee A. McDougall
Assignee (at issue)
Exxon Research and Engineering Company
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.