Granted Patent
Utility
US 5,656,421 · App. 07/654,034
Multi-bioreactor hollow fiber cell propagation system and method
Inventors:
Timothy C. Gebhard, Uday Kumar Veeramallu
Patented Case
View Patent ↗
Granted: Aug 12, 1997
Filed: Feb 12, 1991
Inventors
Timothy C. Gebhard
Uday Kumar Veeramallu
Assignee (at issue)
UniSyn Technologies, Inc.
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.