Granted Patent
Utility
US 5,169,991 · App. 07/486,671
Compound
Inventors:
Jeremy Holmes, Peter A. Tasker
Patented Case
View Patent ↗
Granted: Dec 8, 1992
Filed: Feb 28, 1990
Inventors
Jeremy Holmes
Peter A. Tasker
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.