Granted Patent
Utility
US 5,278,335 · App. 08/060,186
Preparation of aryl-substituted aliphatic carboxylic acid esters by catalytic carbonylation
Inventor:
Kannappan Chockalingam
Patented Case
View Patent ↗
Granted: Jan 11, 1994
Filed: Jun 11, 1993
Inventor
Kannappan Chockalingam
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.