Granted Patent
Utility
US 4,675,449 · App. 06/870,062
Process for producing 6-hydroxy-2-naphthones
Inventor:
Kenneth G. Davenport
Patented Case
View Patent ↗
Granted: Jun 23, 1987
Filed: Jun 3, 1986
Inventor
Kenneth G. Davenport
Assignee (at issue)
Celanese GmbH
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.