Granted Patent
Utility
US 5,126,476 · App. 07/646,535
Process for the preparation of aryl-, heteroaryl-, or cycloalkyl-substituted alkyl urethanes and isocyanates
Inventors:
Mahmoud K. Faraj, Haven S. Kesling, Jr., John G. Zajacek
Patented Case
View Patent ↗
Granted: Jun 30, 1992
Filed: Jan 25, 1991
Inventors
Mahmoud K. Faraj
Haven S. Kesling, Jr.
John G. Zajacek
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.