Granted Patent
Utility
US 4,659,021 · App. 06/791,309
Process for producing purified brominated aromatic compounds
Inventors:
Wendell G. Bark, John C. Parks
Patented Case
View Patent ↗
Granted: Apr 21, 1987
Filed: Oct 25, 1985
Inventors
Wendell G. Bark
John C. Parks
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.