Granted Patent
Utility
US 4,600,428 · App. 06/693,655
N-(cyclopropyl-pyrimidinyl-N'-(aryl-sulfonyl) ureas having herbicidal activity
Inventor:
Henry Szczepanski
Patented Case
View Patent ↗
Granted: Jul 15, 1986
Filed: Jan 22, 1985
Inventor
Henry Szczepanski
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.