Granted Patent
Utility
US 4,994,596 · App. 07/471,614
Cyanoalkenylation process
Inventor:
Barbara C. Stahly
Patented Case
View Patent ↗
Granted: Feb 19, 1991
Filed: Jan 29, 1990
Inventor
Barbara C. Stahly
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.