Granted Patent
Utility
US 4,243,591 · App. 06/016,859
Poly(vinyl phosphonomethylene amino carboxylates) and process for preparation
Inventor:
Ralph W. Magin
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: Mar 2, 1979
Inventor
Ralph W. Magin
Assignee (at issue)
Monsanto 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.