Granted Patent
Utility
US 5,446,233 · App. 08/225,505
Ethylene plant caustic system emulsion breaking with salts of alkyl sulfonic acids
Inventors:
Vincent E. Lewis, Sherri L. Fisher
Patented Case
View Patent ↗
Granted: Aug 29, 1995
Filed: Apr 11, 1994
Inventors
Vincent E. Lewis
Sherri L. Fisher
Assignee (at issue)
Nalco Chemical 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.