Granted Patent
Utility
US 4,855,398 · App. 07/192,987
Reaction of bicyclic amide acetal with urea
Inventor:
Anil B. Goel
Patented Case
View Patent ↗
Granted: Aug 8, 1989
Filed: May 12, 1988
Inventor
Anil B. Goel
Assignee (at issue)
Ashland Oil, 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.