Granted Patent
Utility
US 4,994,096 · App. 07/349,740
Gas chromatograph having integrated pressure programmer
Inventors:
Kenneth Klein, R. John Phillips, Lesley M. Freed, Michael Thompson
Patented Case
View Patent ↗
Granted: Feb 19, 1991
Filed: May 9, 1989
Inventors
Kenneth Klein
R. John Phillips
Lesley M. Freed
Michael Thompson
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.