Granted Patent
Utility
US 5,155,267 · App. 07/782,027
Synthesis of isocyanate precursors from primary formamides
Inventor:
Mahmoud K. Faraj
Patented Case
View Patent ↗
Granted: Oct 13, 1992
Filed: Oct 24, 1991
Inventor
Mahmoud K. Faraj
Assignee (at issue)
Arco Chemical Technology, L.P.
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.