Granted Patent
Utility
US 4,544,509 · App. 06/523,161
Aryl coupling process
Inventor:
Robert I. Davidson
Patented Case
View Patent ↗
Granted: Oct 1, 1985
Filed: Aug 15, 1983
Inventor
Robert I. Davidson
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.