Granted Patent
Utility
US 6,130,199 · App. 09/372,883
Surfactant composition for cleaning wellbore and oil field surfaces using the surfactant composition
Inventors:
Albert F. Chan, William Mark Bohon, David J. Blumer, Kieu T. Ly
Patented Case
View Patent ↗
Granted: Oct 10, 2000
Filed: Aug 12, 1999
Inventors
Albert F. Chan
William Mark Bohon
David J. Blumer
Kieu T. Ly
Assignee (at issue)
Atlantic Richfield 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.