Granted Patent
Utility
US 4,798,837 · App. 07/058,631
Benzoylphenylureas
Inventors:
Jozef Drabek, Manfred Boger
Patented Case
View Patent ↗
Granted: Jan 17, 1989
Filed: Jun 4, 1987
Inventors
Jozef Drabek
Manfred Boger
Assignee (at issue)
Ciba-Geigy
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.