Granted Patent
Utility
US 4,788,298 · App. 06/693,489
Process for the preparation of coumarin compounds
Inventor:
Richard H. S. Wang
Patented Case
View Patent ↗
Granted: Nov 29, 1988
Filed: Jan 22, 1985
Inventor
Richard H. S. Wang
Assignee (at issue)
EASTMAN KODAK COMPANY
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.