Granted Patent
Utility
US 6,000,412 · App. 09/023,379
Method for cleaning deposits from a tank using a surfactant composition
Inventors:
Albert F. Chan, William Mark Bohon, David J. Blumer, Kieu T. Ly, William G. McLelland
Patented Case
View Patent ↗
Granted: Dec 14, 1999
Filed: Feb 13, 1998
Inventors
Albert F. Chan
William Mark Bohon
David J. Blumer
Kieu T. Ly
William G. McLelland
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.