Granted Patent
Utility
US 4,368,162 · App. 06/317,048
Process for producing aminomethylphosphonic acid
Inventor:
Ludwig Maier
Patented Case
View Patent ↗
Granted: Jan 11, 1983
Filed: Nov 2, 1981
Inventor
Ludwig Maier
Assignee (at issue)
Ciba-Geigy
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.