Granted Patent
Utility
US 5,354,431 · App. 08/125,276
Plural stage drying and purification of propylene oxide
Inventor:
Mark E. Taylor
Patented Case
View Patent ↗
Granted: Oct 11, 1994
Filed: Sep 23, 1993
Inventor
Mark E. Taylor
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.