Granted Patent
Utility
US 5,368,734 · App. 08/171,245
Triboelectric filtration material
Inventor:
Ray Wnenchak
Patented Case
View Patent ↗
Granted: Nov 29, 1994
Filed: Dec 20, 1993
Inventor
Ray Wnenchak
Assignee (at issue)
W. L. Gore & Associates, Inc.
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.