Granted Patent
Utility
US 4,496,488 · App. 06/480,568
Copper and manganese removal from C.sub.6 -C.sub.9 saturated aliphatic monocarboxylic acids
Inventor:
Clarence J. Duey, Jr.
Patented Case
View Patent ↗
Granted: Jan 29, 1985
Filed: Mar 30, 1983
Inventor
Clarence J. Duey, Jr.
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.