Granted Patent
Utility
US 6,123,749 · App. 09/071,026
Separation of CO.sub.2 from unsaturated fluorinated compounds by semipermeable membrane
Inventors:
William G. O'Brien, Charles Joseph Noelke, Raymond C. Harker, David John Van Bramer
Patented Case
View Patent ↗
Granted: Sep 26, 2000
Filed: May 1, 1998
Inventors
William G. O'Brien
Charles Joseph Noelke
Raymond C. Harker
David John Van Bramer
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.