Granted Patent
Utility
US 4,455,161 · App. 06/417,528
Trace element fertilizer composition
Inventors:
Michael Cohen, Luther A. Eirich
Patented Case
View Patent ↗
Granted: Jun 19, 1984
Filed: Sep 13, 1982
Inventors
Michael Cohen
Luther A. Eirich
Assignee (at issue)
The O. M. Scott and Sons 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.