Granted Patent
Utility
US 6,287,440 · App. 09/336,535
Method for eliminating gas blocking in electrokinetic pumping systems
Inventors:
Don W. Arnold, Phillip H. Paul, Joseph S. Schoeniger
Patented Case
View Patent ↗
Granted: Sep 11, 2001
Filed: Jun 18, 1999
Inventors
Don W. Arnold
Phillip H. Paul
Joseph S. Schoeniger
Assignee (at issue)
Sandia Corporation
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.