Granted Patent
Utility
US 4,918,019 · App. 07/011,913
Bioreactor system with plasticizer removal
Inventor:
Perry W. Guinn
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Feb 5, 1987
Inventor
Perry W. Guinn
Assignee (at issue)
CD Medical
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.