Granted Patent
Utility
US 4,849,536 · App. 07/150,953
Preparation of alpha-cyanobenzyl esters
Inventor:
John M. Gruber
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Feb 1, 1988
Inventor
John M. Gruber
Assignee (at issue)
Sandoz 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.