Granted Patent
Utility
US 4,915,725 · App. 06/605,441
Herbicide compositions of extended soil life
Inventors:
Daniel L. Hyzak, Reed A. Gray
Patented Case
View Patent ↗
Granted: Apr 10, 1990
Filed: Apr 30, 1984
Inventors
Daniel L. Hyzak
Reed A. Gray
Assignee (at issue)
ICI Americas, Inc.
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.