Granted Patent
Utility
US 5,171,349 · App. 07/690,099
Solubility compound fertilizer compositions
Inventors:
Richard P. Vetanovetz, Robert Bouke Peters
Patented Case
View Patent ↗
Granted: Dec 15, 1992
Filed: Apr 23, 1991
Inventors
Richard P. Vetanovetz
Robert Bouke Peters
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.