Granted Patent
Utility
US 4,867,849 · App. 07/224,045
Purification of alkyl glyoxylate
Inventors:
Dario R. Cova, John M. Thorman
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Jul 25, 1988
Inventors
Dario R. Cova
John M. Thorman
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.