Granted Patent
Utility
US 4,804,628 · App. 07/088,463
Hollow fiber cell culture device and method of operation
Inventors:
Ray Cracauer, Robert D. Walker, Micheal Gruenberg
Patented Case
View Patent ↗
Granted: Feb 14, 1989
Filed: Aug 19, 1987
Inventors
Ray Cracauer
Robert D. Walker
Micheal 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.