Granted Patent
Utility
US 4,670,557 · App. 06/902,552
Process for preparing hydroxymorpholines
Inventor:
Wei-Yang Su
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Sep 2, 1986
Inventor
Wei-Yang Su
Assignee (at issue)
Texaco 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.