Granted Patent
Utility
US 4,335,245 · App. 06/238,346
Process for preparing certain pyridine 2,3,6-triones
Inventor:
William E. Long
Patented Case
View Patent ↗
Granted: Jun 15, 1982
Filed: Feb 26, 1981
Inventor
William E. Long
Assignee (at issue)
Ciba-Geigy
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.