Granted Patent
Utility
US 4,734,192 · App. 06/747,687
Multiwell membrane filtration apparatus
Inventors:
Helena M. Champion, Joseph J. Pierog, Joseph Peters
Patented Case
View Patent ↗
Granted: Mar 29, 1988
Filed: Jun 21, 1985
Inventors
Helena M. Champion
Joseph J. Pierog
Joseph Peters
Assignee (at issue)
Millipore Corporation
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.