Granted Patent
Utility
US 6,562,238 · App. 09/222,169
Method and apparatus for controlling counter current
Inventors:
Jeffrey S. Fodor, Fernando C. Vidaurri
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Dec 29, 1998
Inventors
Jeffrey S. Fodor
Fernando C. Vidaurri
Assignee (at issue)
Phillips Petroleum 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.