Granted Patent
Utility
US 5,663,402 · App. 08/409,011
Process for the preparation of phosphorodithioic compounds via thionation reaction
Inventors:
Edward J. Griffith, Toan M. Ngo
Patented Case
View Patent ↗
Granted: Sep 2, 1997
Filed: Mar 27, 1995
Inventors
Edward J. Griffith
Toan M. Ngo
Assignee (at issue)
G.D. Searle LLC
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.