Granted Patent
Utility
US 4,243,809 · App. 05/954,820
Process for the production of pyridone compounds
Inventor:
Karl Seitz
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: Oct 26, 1978
Inventor
Karl Seitz
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.