Granted Patent
Utility
US 6,557,428 · App. 09/922,943
Head space gas sampling and venting method and arrangement, and filtering and sampling ports used therewith
Inventors:
Terry J. Wickland, Darold M. Popish, Gilbert Brassell, Fred Popish, Mark A. Castagneri, Michael D. Peterson
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Aug 7, 2001
Inventors
Terry J. Wickland
Darold M. Popish
Gilbert Brassell
Fred Popish
Mark A. Castagneri
Michael D. Peterson
Assignee (at issue)
NUCLEAR FILTER TECHNOLOGY, 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.