Granted Patent
Utility
US 5,714,055 · App. 08/695,448
Caustic tower trap for acetaldehyde
Inventors:
Vincent E. Lewis, Natu R. Patel
Patented Case
View Patent ↗
Granted: Feb 3, 1998
Filed: Aug 12, 1996
Inventors
Vincent E. Lewis
Natu R. Patel
Assignee (at issue)
Nalco/Exxon Energy Chemicals, L.P.
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.