Granted Patent
Utility
US 6,698,917 · App. 10/159,333
Process for blending fluids of widely differing viscosities
Inventors:
Arthur William Etchells, III, Charles Linfred Henderson, Felix Streiff, Andreas Walder
Patented Case
View Patent ↗
Granted: Mar 2, 2004
Filed: May 31, 2002
Inventors
Arthur William Etchells, III
Charles Linfred Henderson
Felix Streiff
Andreas Walder
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.