Granted Patent
Utility
US 4,659,863 · App. 06/775,166
Phenolic ester synthesis
Inventor:
Lester P. J. Burton
Patented Case
View Patent ↗
Granted: Apr 21, 1987
Filed: Sep 12, 1985
Inventor
Lester P. J. Burton
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.