Granted Patent
Utility
US 4,652,298 · App. 06/649,639
Herbicide compositions of extended soil life
Inventors:
Reed A. Gray, Daniel L. Hyzak
Patented Case
View Patent ↗
Granted: Mar 24, 1987
Filed: Sep 12, 1984
Inventors
Reed A. Gray
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.