Granted Patent
Utility
US 5,705,719 · App. 08/690,923
Selective removal of perfluoroisobutylene from streams of halogenated hydrocarbons
Inventors:
Jan Pieter Jacques Bloos, Tom Spoormaker, Glenn Fred Leverett
Patented Case
View Patent ↗
Granted: Jan 6, 1998
Filed: Aug 1, 1996
Inventors
Jan Pieter Jacques Bloos
Tom Spoormaker
Glenn Fred Leverett
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.