Granted Patent
Utility
US 4,289,029 · App. 06/090,818
High temperature injection and vaporization system for gas chromatography
Inventors:
Robert W. Sampson, Francis H. Franke
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Nov 2, 1979
Inventors
Robert W. Sampson
Francis H. Franke
Assignee (at issue)
UOP LLC
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.