Granted Patent
Utility
US 5,612,213 · App. 08/333,706
Method of selecting mammalian cell lines having improved productivity
Inventor:
Sham-Yuen Chan
Patented Case
View Patent ↗
Granted: Mar 18, 1997
Filed: Nov 3, 1994
Inventor
Sham-Yuen Chan
Assignee (at issue)
Bayer Aktiengesellschaft
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.