Granted Patent
Utility
US 4,478,636 · App. 06/472,456
Herbicidal compositions of extended soil life
Inventor:
Daniel L. Hyzak
Patented Case
View Patent ↗
Granted: Oct 23, 1984
Filed: Mar 7, 1983
Inventor
Daniel L. Hyzak
Assignee (at issue)
Stauffer Chemical Company
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.