Granted Patent
Utility
US 5,623,091 · App. 08/523,194
Process for the production of bis(fluoromethyl)ether
Inventors:
Jane Lesley Butcher, Thomas Anthony Ryan, Leslie Burgess
Patented Case
View Patent ↗
Granted: Apr 22, 1997
Filed: Sep 5, 1995
Inventors
Jane Lesley Butcher
Thomas Anthony Ryan
Leslie Burgess
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.