Granted Patent
Utility
US 5,902,911 · App. 08/849,304
Production of 2-chloro-2-hydrohexafluoropropane and azeotropes thereof with HF
Inventors:
Velliyur Nott Mallikarjuna Rao, Edwin J. Warwas
Patented Case
View Patent ↗
Granted: May 11, 1999
Filed: Jun 3, 1997
Inventors
Velliyur Nott Mallikarjuna Rao
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.