Granted Patent
Utility
US 6,291,727 · App. 09/024,844
Azeotropic or azeotrop-like compositions of hydrofluoric acid with dihaloethanes
Inventors:
Maria U. D. Beug-Deeb, Barry Asher Mahler, Ralph Newton Miller
Patented Case
View Patent ↗
Granted: Sep 18, 2001
Filed: Feb 17, 1998
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.