Granted Patent
Utility
US 4,473,696 · App. 06/433,273
Synthesis of 2-substituted-5-methyl-pyridines
Inventors:
Ludwig Hartmann, John F. Stephen
Patented Case
View Patent ↗
Granted: Sep 25, 1984
Filed: Oct 7, 1982
Inventors
Ludwig Hartmann
John F. Stephen
Assignee (at issue)
ICI Americas, 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.