Granted Patent
Utility
US 4,950,323 · App. 07/002,465
Herbicidal bis-formyl-N-aryl-N'-alkyl ureas and methods of use
Inventor:
Charles Kezerian
Patented Case
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Granted: Aug 21, 1990
Filed: Jan 12, 1987
Inventor
Charles Kezerian
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.