Granted Patent
Utility
US 4,225,506 · App. 06/038,760
Process for manufacturing a diketone
Inventor:
Max Schmid
Patented Case
View Patent ↗
Granted: Sep 30, 1980
Filed: May 14, 1979
Inventor
Max Schmid
Assignee (at issue)
HOFFMANN-LA ROCHE 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.