Granted Patent
Utility
US 4,490,535 · App. 06/479,259
4-(3- and 4-Chlorocyclohex-3-enyl)pyridine intermediates
Inventor:
Thomas Walter
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Jun 20, 1983
Inventor
Thomas Walter
Assignee (at issue)
Ethyl Corporation
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.