Granted Patent
Utility
US 4,484,483 · App. 06/354,409
Needle assembly useful in the head-space method of gas chromatography
Inventors:
Wolfgang Riegger, Wolfgang Chlosta
Patented Case
View Patent ↗
Granted: Nov 27, 1984
Filed: Mar 3, 1982
Inventors
Wolfgang Riegger
Wolfgang Chlosta
Assignee (at issue)
Bodenseewerk Perkin-Elmer GmbH
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.