Granted Patent
Utility
US 4,549,995 · App. 06/554,581
Process for making alkanephosphonous acid esters
Inventors:
Eberhard Auer, Klaus Gehrmann, Alexander Ohorodnik, Johannes Rosenthal
Patented Case
View Patent ↗
Granted: Oct 29, 1985
Filed: Nov 23, 1983
Inventors
Eberhard Auer
Klaus Gehrmann
Alexander Ohorodnik
Johannes Rosenthal
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.