Granted Patent
Utility
US 4,238,327 · App. 06/052,177
Electric resonance chromatography
Inventor:
Robert P. Liburdy
Patented Case
View Patent ↗
Granted: Dec 9, 1980
Filed: Jun 25, 1979
Inventor
Robert P. Liburdy
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.