Granted Patent
Utility
US 4,477,673 · App. 06/458,232
Process for the preparation of substituted divinylpyridines and novel substituted divinylpyridines
Inventor:
Jurgen Kaschig
Patented Case
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Granted: Oct 16, 1984
Filed: Jan 17, 1983
Inventor
Jurgen Kaschig
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.