Granted Patent
Utility
US 6,262,145 · App. 09/464,013
Process for the extraction of material from multi-phase systems
Inventors:
Rudolf Jacobus Winjngaarden, Ye-Mon Chen, David K. Schisla
Patented Case
View Patent ↗
Granted: Jul 17, 2001
Filed: Dec 15, 1999
Inventors
Rudolf Jacobus Winjngaarden
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.