Granted Patent
Utility
US 4,803,201 · App. 07/054,897
Homocyclic derivatives
Inventor:
Arnold H. Ratcliffe
Patented Case
View Patent ↗
Granted: Feb 7, 1989
Filed: May 28, 1987
Inventor
Arnold H. Ratcliffe
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.