Granted Patent
Utility
US 5,866,729 · App. 08/778,440
Manufacture of 1, 1-difluoroethane
Inventors:
Mario Joseph Nappa, William R. Williams
Patented Case
View Patent ↗
Granted: Feb 2, 1999
Filed: Jan 2, 1997
Inventors
Mario Joseph Nappa
William R. Williams
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.