Granted Patent
Utility
US 5,220,021 · App. 07/761,733
Geminal bisphosphonic acids and derivatives as anti-arthritic agents
Inventors:
Colin J. Dunn, Richard Nugen
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Sep 6, 1991
Inventors
Colin J. Dunn
Richard Nugen
Assignee (at issue)
The Upjohn Co.
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.