Granted Patent
Utility
US 5,200,068 · App. 07/819,828
Controlled charge chromatography system
Inventor:
Marc D. Andelman
Patented Case
View Patent ↗
Granted: Apr 6, 1993
Filed: Jan 13, 1992
Inventor
Marc D. Andelman
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.