Granted Patent
Utility
US 4,477,266 · App. 06/532,321
Solute focusing technique for on-column injection in capillary gas chromatography
Inventors:
Frank Yang, John Hinshaw
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Sep 15, 1983
Inventors
Frank Yang
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.