Granted Patent
Utility
US 4,280,881 · App. 06/165,381
Separating indene from unsaturated alkylaromatics
Inventors:
John C. Montagna, Robert D. Galli, John Freel
Patented Case
View Patent ↗
Granted: Jul 28, 1981
Filed: Jul 2, 1980
Inventors
John C. Montagna
Robert D. Galli
John Freel
Assignee (at issue)
Gulf Research & Development Company
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.