Granted Patent
Utility
US 4,296,205 · App. 06/123,552
Cell culture and continuous dialysis flask and method
Inventor:
Dharmvir S. Verma
Patented Case
View Patent ↗
Granted: Oct 20, 1981
Filed: Feb 22, 1980
Inventor
Dharmvir S. Verma
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.