Granted Patent
Utility
US 4,567,287 · App. 06/638,800
Preparation of carbamates from organic carbonates and aromatic ureas
Inventors:
Floro F. Frulla, Fred A. Stuber, Peter J. Whitman
Patented Case
View Patent ↗
Granted: Jan 28, 1986
Filed: Aug 8, 1984
Inventors
Floro F. Frulla
Fred A. Stuber
Peter J. Whitman
Assignee (at issue)
The Upjohn Co.
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.