Granted Patent
Utility
US 4,724,261 · App. 06/933,833
Cyclic ureas
Inventor:
Raymond A. Felix
Patented Case
View Patent ↗
Granted: Feb 9, 1988
Filed: Nov 24, 1986
Inventor
Raymond A. Felix
Assignee (at issue)
Stauffer Chemical 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.