Granted Patent
Utility
US 4,478,852 · App. 06/377,598
Urea derivatives having a pesticidal activity
Inventors:
Heinz-Manfred Becher, Christo Drandarevski, Sigmund Lust
Patented Case
View Patent ↗
Granted: Oct 23, 1984
Filed: May 12, 1982
Inventors
Heinz-Manfred Becher
Christo Drandarevski
Sigmund Lust
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.