Granted Patent
Utility
US 5,288,692 · App. 07/707,322
Systemic herbicides and methods of use
Inventor:
Donald C. Young
Patented Case
View Patent ↗
Granted: Feb 22, 1994
Filed: Dec 27, 1990
Inventor
Donald C. Young
Assignee (at issue)
Union Oil Company of California
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.