Granted Patent
Utility
US 5,543,387 · App. 08/387,592
Surfactant additive for oilfield acidizing
Inventors:
Anita R. Mokadam, Charles E. Strubelt, Dennis A. Williams, Kenneth M. Webber
Patented Case
View Patent ↗
Granted: Aug 6, 1996
Filed: Feb 13, 1995
Inventors
Anita R. Mokadam
Charles E. Strubelt
Dennis A. Williams
Kenneth M. Webber
Assignees (at issue)
Nalco/Exxon Energy Chemicals, L.P.
Exxon Production Research 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.