Granted Patent
Utility
US 4,576,747 · App. 06/608,005
Isocyanato-azetidinediones
Inventor:
Shenghong A. Dai
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: May 7, 1984
Inventor
Shenghong A. Dai
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.