Granted Patent
Utility
US 6,043,299 · App. 08/950,683
Process for the extraction of material from multi-phase systems
Inventors:
Rudolf Jacobus Wijngaarden, Ye-Mon Chen, David K. Schisla
Patented Case
View Patent ↗
Granted: Mar 28, 2000
Filed: Oct 15, 1997
Inventors
Rudolf Jacobus Wijngaarden
Ye-Mon Chen
David K. Schisla
Assignee (at issue)
SHELL OIL 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.