Granted Patent
Utility
US 4,957,538 · App. 07/273,371
Certain 2-(2',3',4'-trisubstituted benzoyl)-1,3-cyclohexanediones
Inventor:
William J. Michaely
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Nov 18, 1988
Inventor
William J. Michaely
Assignee (at issue)
ICI Americas, Inc.
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.