Granted Patent
Utility
US 4,474,595 · App. 06/472,052
Fertilizer product and process for making and using it
Inventors:
William T. Lawhon, Jr., Henry M. Grotta
Patented Case
View Patent ↗
Granted: Oct 2, 1984
Filed: Mar 10, 1983
Inventors
William T. Lawhon, Jr.
Henry M. Grotta
Assignee (at issue)
International Spike, 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.