Granted Patent
Utility
US 5,962,753 · App. 08/793,169
Process for the manufacture of pentafluoroethane
Inventors:
Charles John Shields, Paul Nicholas Ewing
Patented Case
View Patent ↗
Granted: Oct 5, 1999
Filed: Feb 18, 1997
Inventors
Charles John Shields
Paul Nicholas Ewing
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.