Granted Patent
Utility
US 4,615,840 · App. 06/659,593
Aminomethylenephosphonic acid solutions
Inventors:
Michel A. O. Ledent, Bronislav H. May
Patented Case
View Patent ↗
Granted: Oct 7, 1986
Filed: Oct 11, 1984
Inventors
Michel A. O. Ledent
Bronislav H. May
Assignee (at issue)
Monsanto Europe S.A.
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.