Granted Patent
Utility
US 4,283,280 · App. 06/116,466
Cartridge type separation column and holder assembly for liquid chromatographs
Inventor:
Robert Brownlee
Patented Case
View Patent ↗
Granted: Aug 11, 1981
Filed: Jan 29, 1980
Inventor
Robert Brownlee
Assignee (at issue)
Brownlee Labs, 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.