Granted Patent
Utility
US 6,281,395 · App. 09/283,451
1,1,1,2,3,3,3-heptafluoropropane manufacturing process
Inventors:
Mario Joseph Nappa, V. N. Mallikarjuna Rao, Allen Capron Sievert
Patented Case
View Patent ↗
Granted: Aug 28, 2001
Filed: Apr 1, 1999
Inventors
Mario Joseph Nappa
V. N. Mallikarjuna Rao
Allen Capron Sievert
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.