Granted Patent
Utility
US 4,257,906 · App. 06/112,005
Method of protecting nitrilotriacetate salts
Inventor:
Marvin M. Crutchfield
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Jan 14, 1980
Inventor
Marvin M. Crutchfield
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.