Granted Patent
Utility
US 5,288,879 · App. 07/952,693
Tetrahalophthalic anhydride process
Inventors:
Scott A. Bottelberghe, Bonnie G. McKinnie, Steven G. Miller, David Edward Raposa
Patented Case
View Patent ↗
Granted: Feb 22, 1994
Filed: Sep 28, 1992
Inventors
Scott A. Bottelberghe
Bonnie G. McKinnie
Steven G. Miller
David Edward Raposa
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.