Granted Patent
Utility
US 5,589,691 · App. 08/254,213
Process for recovery and recycle of methanesulfonic acid and phosphorous acid
Inventors:
Edamanal S. Venkataramani, Andrew L. Forman, Ralph J. Magliette, Jr., William A. Vaughn, Richard R. Dauer
Patented Case
View Patent ↗
Granted: Dec 31, 1996
Filed: Jun 6, 1994
Inventors
Edamanal S. Venkataramani
Andrew L. Forman
Ralph J. Magliette, Jr.
William A. Vaughn
Richard R. Dauer
Assignee (at issue)
MERCK & CO., INC.
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.