Granted Patent
Utility
US 6,496,728 · App. 09/783,696
Methods for extracting substances using alternating current
Inventors:
S. Kevin Li, William I. Higuchi, Honggang Zhu, Yang Song
Patented Case
View Patent ↗
Granted: Dec 17, 2002
Filed: Feb 13, 2001
Inventors
S. Kevin Li
William I. Higuchi
Honggang Zhu
Yang Song
Assignee (at issue)
The University of Utah Research Foundation
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.