Granted Patent
Utility
US 5,789,633 · App. 08/617,457
Azeotropic or azeotrope-like compositions of hydrofluoric acid with dihaloethanes
Inventors:
Maria U. D. Beug-Deeb, Barry Asher Mahler, Ralph Newton Miller
Patented Case
View Patent ↗
Granted: Aug 4, 1998
Filed: Mar 18, 1996
Inventors
Maria U. D. Beug-Deeb
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.