Granted Patent
Utility
US 5,827,492 · App. 08/481,516
Hydrogen chloride purification process
Inventors:
David Richard Corbin, Barry Asher Mahler
Patented Case
View Patent ↗
Granted: Oct 27, 1998
Filed: Jul 26, 1995
Inventors
David Richard Corbin
Barry Asher Mahler
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.