Granted Patent
Utility
US 6,506,950 · App. 08/458,331
Saturated linear polyfluorohydrocarbons, processes for their production, and their use in cleaning compositions
Inventor:
Carl G. Krespan
Patented Case
View Patent ↗
Granted: Jan 14, 2003
Filed: Jun 2, 1995
Inventor
Carl G. Krespan
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.