Granted Patent
Utility
US 5,326,869 · App. 07/979,096
Chemical process
Inventor:
Jonathan Hutton
Patented Case
View Patent ↗
Granted: Jul 5, 1994
Filed: Nov 20, 1992
Inventor
Jonathan Hutton
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.