Granted Patent
Utility
US 6,539,312 · App. 09/951,587
Sampling system for obtaining pipeline gas samples
Inventors:
Spencer M. Nimberger, Kevin J. Cessac
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: Sep 13, 2001
Inventors
Spencer M. Nimberger
Kevin J. Cessac
Assignee (at issue)
PGI INTERNATIONAL, LTD.
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.