Granted Patent
Utility
US 4,806,660 · App. 07/211,116
Aurone oxypropanolamines
Inventor:
Edwin S. C. Wu
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Jun 21, 1988
Inventor
Edwin S. C. Wu
Assignee (at issue)
Pennwalt Corporation
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.