Granted Patent
Utility
US 6,002,012 · App. 09/045,203
Process for the preparation of [(5,6-dicarboxy-3-pyridyl) methyl] ammonium halides
Inventor:
Wen-Xue Wu
Patented Case
View Patent ↗
Granted: Dec 14, 1999
Filed: Mar 20, 1998
Inventor
Wen-Xue Wu
Assignee (at issue)
American Cyanamid 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.