Granted Patent
Utility
US 6,303,838 · App. 09/509,859
Separating 1,1,1,3,3-pentafluoropropane from hydrogen fluoride
Inventors:
Sara W. Boehmer, Barry Asher Mahler, Ralph Newton Miller
Patented Case
View Patent ↗
Granted: Oct 16, 2001
Filed: Mar 31, 2000
Inventors
Sara W. Boehmer
Barry Asher Mahler
Ralph Newton Miller
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.