Granted Patent
Utility
US 4,848,917 · App. 07/237,254
Automatic vortex mixer
Inventors:
Joshua Benin, William G. Di Maio, Carl F. Morin
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Aug 26, 1988
Inventors
Joshua Benin
William G. Di Maio
Carl F. Morin
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.