Granted Patent
Utility
US 4,622,340 · App. 06/604,371
Urea derivatives and pesticidal compositions containing same
Inventors:
Heinz-Manfred Becher, Ricarda Prokic-Immel, Walter Wirtz
Patented Case
View Patent ↗
Granted: Nov 11, 1986
Filed: Apr 26, 1984
Inventors
Heinz-Manfred Becher
Ricarda Prokic-Immel
Walter Wirtz
Assignee (at issue)
Celamerck GmbH & Co. KG
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.