Granted Patent
Utility
US 4,474,588 · App. 06/483,803
Unheated septumless on-column injection system for capillary gas chromatography
Inventor:
John Hinshaw
Patented Case
View Patent ↗
Granted: Oct 2, 1984
Filed: Apr 11, 1983
Inventor
John Hinshaw
Assignee (at issue)
Varian, 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.