Granted Patent
Utility
US 5,672,786 · App. 08/507,429
Production of difluoromethane
Inventors:
David William Bonniface, John David Scott, Michael John Watson
Patented Case
View Patent ↗
Granted: Sep 30, 1997
Filed: Sep 6, 1995
Inventors
David William Bonniface
John David Scott
Michael John Watson
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.