Granted Patent
Utility
US 4,944,875 · App. 07/208,924
Plural filter tube sequential distribution apparatus
Inventor:
Yves Gaignet
Patented Case
View Patent ↗
Granted: Jul 31, 1990
Filed: Jun 20, 1988
Inventor
Yves Gaignet
Assignee (at issue)
Millipore S.A.
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.