Granted Patent
Utility
US 4,722,902 · App. 06/794,627
Apparatus and method for culturing cells, removing waste and concentrating product
Inventors:
William H. Harm, Mark Hirschel, Michael Gruenberg
Patented Case
View Patent ↗
Granted: Feb 2, 1988
Filed: Nov 4, 1985
Inventors
William H. Harm
Mark Hirschel
Michael Gruenberg
Assignee (at issue)
Endotronics, 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.