Granted Patent
Utility
US 4,303,479 · App. 06/099,306
Distillation separation method
Inventors:
Shirley L. Church, Loren M. Hilts
Patented Case
View Patent ↗
Granted: Dec 1, 1981
Filed: Dec 3, 1979
Inventors
Shirley L. Church
Loren M. Hilts
Assignee (at issue)
THE GOODYEAR TIRE & RUBBER 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.