Granted Patent
Utility
US 5,228,897 · App. 07/871,525
Substituted pyridine compounds
Inventors:
Donald E. Korte, Len F. Lee
Patented Case
View Patent ↗
Granted: Jul 20, 1993
Filed: Apr 20, 1992
Inventors
Donald E. Korte
Len F. Lee
Assignee (at issue)
Monsanto 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.