Granted Patent
Utility
US 6,074,461 · App. 09/126,531
Chromatograph having a gas recycling system
Inventor:
William H. Wilson
Patented Case
View Patent ↗
Granted: Jun 13, 2000
Filed: Jul 30, 1998
Inventor
William H. Wilson
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.