Granted Patent
Utility
US 4,758,678 · App. 06/887,756
Preparation of 7-(2,3-epoxypropoxy)flavone
Inventor:
Hans F. Schmitthenner
Patented Case
View Patent ↗
Granted: Jul 19, 1988
Filed: Jul 18, 1986
Inventor
Hans F. Schmitthenner
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.