Granted Patent
Utility
US 5,495,042 · App. 08/145,591
Non-alkaline purification of aminophosphonic acids
Inventors:
Benjamin A. Belinka, Jr., Daniel J. Coughlin
Patented Case
View Patent ↗
Granted: Feb 27, 1996
Filed: Nov 4, 1993
Inventors
Benjamin A. Belinka, Jr.
Daniel J. Coughlin
Assignee (at issue)
CYTOGEN, 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.