Granted Patent
Utility
US 5,167,809 · App. 07/757,868
Chromatography system
Inventors:
Anthony Frederick Mann, Vincenzo Vassarotti
Patented Case
View Patent ↗
Granted: Dec 1, 1992
Filed: Sep 11, 1991
Inventors
Anthony Frederick Mann
Vincenzo Vassarotti
Assignee (at issue)
Amicon Limited
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.