Granted Patent
Utility
US 4,482,719 · App. 06/391,434
Process for obtaining 3-cyanopyridine
Inventors:
Beschke Helmut, Dahm Ludwig, Friedrich Heinz
Patented Case
View Patent ↗
Granted: Nov 13, 1984
Filed: Jun 23, 1982
Inventors
Beschke Helmut
Dahm Ludwig
Friedrich Heinz
Assignee (at issue)
Degussa 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.