Granted Patent
Utility
US 5,216,154 · App. 07/825,898
Process for the preparation of n-methylmorpholine oxide
Inventor:
Robert L. Zimmerman
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Jan 27, 1992
Inventor
Robert L. Zimmerman
Assignee (at issue)
Texaco Chemical Inc.
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.