Granted Patent
Utility
US 6,224,781 · App. 09/137,343
Compositions comprising hydrofluorocarbons and their manufacture
Inventors:
Barry Asher Mahler, V. N. Mallikarjuna Rao, Allen Capron Sievert, Munirpallam A. Subramanian, Edwin J. Warwas
Patented Case
View Patent ↗
Granted: May 1, 2001
Filed: Aug 20, 1998
Inventors
Barry Asher Mahler
V. N. Mallikarjuna Rao
Allen Capron Sievert
Munirpallam A. Subramanian
Edwin J. Warwas
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.