Granted Patent
Utility
US 5,705,670 · App. 08/599,485
Process for the preparation of alkali metal salts of phosphonic acid monomethyl esters
Inventor:
Hans-Jerg Kleiner
Patented Case
View Patent ↗
Granted: Jan 6, 1998
Filed: Jan 24, 1996
Inventor
Hans-Jerg Kleiner
Assignee (at issue)
Hoechst GmbH
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.