Granted Patent
Utility
US 5,196,115 · App. 07/760,752
Controlled charge chromatography system
Inventor:
Marc D. Andelman
Patented Case
View Patent ↗
Granted: Mar 23, 1993
Filed: Sep 16, 1991
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.