Granted Patent
Utility
US 5,286,272 · App. 07/854,197
Water soluble potassium phosphate caking inhibitor for fertilizer
Inventors:
Richard L. Biamonte, Lorraine A. Corvino
Patented Case
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Granted: Feb 15, 1994
Filed: Mar 20, 1992
Inventors
Richard L. Biamonte
Lorraine A. Corvino
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.