Granted Patent
Utility
US 5,374,294 · App. 08/064,718
Controlled release potassium divalent metal phosphate fertilizer
Inventor:
William P. Moore
Patented Case
View Patent ↗
Granted: Dec 20, 1994
Filed: May 19, 1993
Inventor
William P. Moore
Assignee (at issue)
The Vigoro Corporation
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.