Granted Patent
Utility
US 4,785,083 · App. 06/453,750
Mixtures of 1-N-C.sub.3-7 alkyl-5-(4'-chloro-2'nitrophenylozo)-3-cyano-6-hydroxy-4-methylpyrid-2-o ne compounds
Inventor:
Ulrich Zirngibl
Patented Case
View Patent ↗
Granted: Nov 15, 1988
Filed: Dec 27, 1982
Inventor
Ulrich Zirngibl
Assignee (at issue)
Sandoz AG
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.