Granted Patent
Utility
US 5,517,867 · App. 08/276,187
Liquid extraction apparatus
Inventors:
Keith A. Ely, Peter Louis Gebrian, William C. Hoffman
Patented Case
View Patent ↗
Granted: May 21, 1996
Filed: Jul 15, 1994
Inventors
Keith A. Ely
Peter Louis Gebrian
William C. Hoffman
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND 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.